Dirt buildup on the chip? | The diary records different kinds of residue [OK Prostate Chip]

This page is based on entries from "ok-lab's diary" (https://ok-lab.hatenablog.com/), the Japanese development diary written by Mr. Okada, founder of OK Lab, a small company in Japan (Okada Comfortable Life Laboratory). Only the entries about "dirt trapped in gaps and twisted wires" are summarized here, in order of publication. Past prices and sizes are as written at the time. Current prices come from the official product list (retrieved September 4, 2026). Quotations are translated from Japanese.

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Note: This page is a personal reading log by someone with no connection to the maker or the seller. It reflects the source entries as of their publication dates and makes no guarantee of accuracy or safety. The product is not a medical device; talk to a doctor about any health decision. Check the official site for current information. This page contains advertising.

In short

• The diary records grime in wire twists, white deposits on chips, and hardened residue on tubing.
• The diary discusses cleaning and wire replacement, but some suggestions lack recorded tests.
• The latest supplied entry describes a requested cable covering, without a recorded result showing whether it prevented buildup.

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About this product

The OK Prostate Chip is a small device that is placed in the urethra (the urine passage) so that it acts on the prostate; the maker sells it in several shapes, sizes and materials. It is made and sold by OK Lab (Okada Comfortable Life Laboratory), a small company in Japan, through its own online store, and prices are in Japanese yen (JPY).

The maker's development diary, "ok-lab's diary", is written in Japanese. This page is an English summary of it, and every quotation is translated. OK Lab ships internationally, so readers outside Japan can order (see "Buying from outside Japan" below).

Product names on this page are plain-English descriptions. The official Japanese product name is shown once in the product table so you can find the same item in the store.

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Before you read: key terms

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What happens: dirt buildup on the chip

The OK Prostate Chip is a device placed in the urethra (the urine passage) to act on the prostate. The entries describe residue on a stopper (an added stopping component), between wire turns, across chip surfaces, and along flexible tubing. Connecting wires join separate parts, and a later customer wanted a covering to keep dirt out of the gap beside a cable. These reports concern different parts and different kinds of residue.

Dirt buildup left one stopper lightly yellow without reported deterioration

In an entry published in July 2018, a customer reported nearly one month of continuous wear with an extra-thick, extra-long chip. Their concern was residue collecting on the stopper, an added component whose precise function these passages do not explain. They reported only a faint yellow discoloration.

The customer found no extra thickness, reduced stopping action, or visible deterioration of the stopper itself. No matching product can be confirmed on the current list. Mr. Okada interpreted the report as reassurance about the stopper during extended wear.

(Source: ok-lab's diary, published July 2018)
https://ok-lab.hatenablog.com/entry/20180728/1532762071

Dirt buildup concerned a reader at the twisted wire connection

An entry published in November 2021 records a reader's concern about grime collecting in twists of connecting wire. The wire joined a fishbone-shaped chip to a comma-shaped auxiliary chip (an additional chip whose purpose is not explained here). The complaint specifically concerned the twisted connection.

The diary does not record whether that buildup affected the connection's strength or how the assembly felt in use. No matching product can be confirmed on the current list. Mr. Okada suggested cleaning equipment or replacement of the wire.

(Source: ok-lab's diary, published November 2021)
https://ok-lab.hatenablog.com/entry/2021/11/20/125643

White deposits appeared from the first day on a resin chip

In an entry published in August 2022, a customer reported white deposits on their long knobbled resin chip from the first day. They suggested that this might happen with any chip made from biocompatible resin (the material named in their report). Their own flat auxiliary chip remained clean, while bumps and curved surfaces on the main chip collected more material.

The customer suspected calcium oxalate (a substance associated here with urinary stones); the diary does not record laboratory identification. No matching product can be confirmed on the current list. Mr. Okada associated prolonged wear with stone-like buildup and favored citric acid (a household cleaner ingredient).

(Source: ok-lab's diary, published August 2022)
https://ok-lab.hatenablog.com/entry/2022/08/27/123001

Sticky residue made flexible tubing feel rough after earlier comfort

In an entry published in November 2023, Mr. Okada described unexpected discomfort with a flexible, gourd-shaped device after more than one week of comfort. He wrote that semen had remained on its tubing after ejaculation without subsequent urination. In his account, the residue became glue-like and left the normally flexible tube rough and stiff.

He attributed the discomfort to that stiffened tubing pressing outward against the urine passage. No matching product can be confirmed on the current list. His advice focused on addressing residue after ejaculation, before it hardened on the tubing.

(Source: ok-lab's diary, published November 2023)
https://ok-lab.hatenablog.com/entry/2023/11/18/122841

Dirt buildup prompted a request for covering exposed cable gaps

In an entry published in September 2024, a customer reported dirt entering the gap between a chip and its cable during continued use. They requested a rubber or resin covering over the wire running along the second chip. The stated aim was to stop residue entering that gap.

Their proposed assembly combined a long knobbled chip with a curved, flat-faced M chip. They also requested rubber coating between the chips, referring to an earlier custom design. Mr. Okada's quoted reply favored a covered cord behind the second chip.

(Source: ok-lab's diary, published September 2024)
https://ok-lab.hatenablog.com/entry/2024/09/21/122907

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The maker's answer to dirt buildup on the chip

The diary discusses wire replacement and cleaning, but provides no compatibility tests for the chemicals it mentions.

Dirt buildup in wire twists drew cleaning and replacement suggestions

Mr. Okada's reply published in November 2021 offered two ideas for grime in the twisted connecting wire. He thought an ultrasonic cleaner (a machine used for cleaning eyeglasses) might help. The diary does not record a cleaning trial with that machine.

He also estimated that someone familiar with the wire could replace it in 10 minutes. The diary does not record whether the commenter tried either option or whether the buildup returned. When dirt became noticeable, Mr. Okada favored replacement of the connecting wire.

(Source: ok-lab's diary, published November 2021)
https://ok-lab.hatenablog.com/entry/2021/11/20/125643

White deposits responded to cleaning experiments, but compatibility remained untested

The customer experiment published in August 2022 involved sodium sesquicarbonate (the cleaning substance in this experiment) and deliberately accumulated white deposits. The customer reported that the material became brittle and that a clearly visible amount came away, although some remained. Their follow-up reported that citric acid also removed remaining deposits.

Mr. Okada expressed confidence in citric acid because of its household use. The diary does not record a resin compatibility test for citric acid. The entry also records advice rejecting licking as a cleaning method and favoring citric acid.

(Source: ok-lab's diary, published August 2022)
https://ok-lab.hatenablog.com/entry/2022/08/27/123001

Sticky residue led Mr. Okada to favor cleaning after ejaculation

In the entry published in November 2023, Mr. Okada extended his concern from the gourd-shaped device to chips generally. He suspected that lingering discomfort after ejaculation could have the same explanation: residue making the surface feel stiff. He thought repeated urination would wash that residue away, with comfort returning after about half a day.

The diary does not record a follow-up confirming that recovery time. He believed ordinary chips and single tubes reacted less strongly because they did not expand like the gourd-shaped device. Mr. Okada favored cleaning after ejaculation for both the gourd-shaped device and the chip.

(Source: ok-lab's diary, published November 2023)
https://ok-lab.hatenablog.com/entry/2023/11/18/122841

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How dirt buildup on the chip changed over time

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OK Prostate Chip products related to dirt buildup on the chip

No current product is directly tied to this topic.

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Common worries about dirt buildup on the chip

The reader correspondence raises questions about resin compatibility, added thickness, and whether a requested custom assembly could be completed.

"Could cleaning white deposits affect the resin?"

The customer whose message was published in August 2022 questioned whether the cleaning substance might affect the chip's resin. They thought the sodium sesquicarbonate was unlikely to alter it, but had not checked the material's technical documentation. A reply published from another contributor said compatibility seemed probable, while explicitly acknowledging that no tests had been performed.

That reply also said urine contains several kinds of crystals. It cautioned that the suggested cleaner would not dissolve all of them. The published reply advised including that limitation when presenting the cleaning suggestion.

(Source: ok-lab's diary, published August 2022)
https://ok-lab.hatenablog.com/entry/2022/08/27/123001

"Could covering cable gaps make the second chip too thick?"

In the entry published in September 2024, the customer requesting cable covering also asked about the second chip's resulting thickness. They asked whether its thickest point was about 5.5 mm, including 2.5 mm beyond the chip's thickness. Their stated limit was about 6 mm, based on their own comparison with an 8 mm diameter.

They dropped their request for bumps, while accepting slightly more than 6 mm locally if construction produced uneven thickness. The diary does not record a confirmed final thickness for the completed assembly. Mr. Okada's quoted advice favored side-by-side wires between the chips, which he considered preferable for strength and size.

(Source: ok-lab's diary, published September 2024)
https://ok-lab.hatenablog.com/entry/2024/09/21/122907

"Could covered cable gaps work with a larger snap connector?"

The customer whose request was published in September 2024 also wanted a larger snap connector (a button-like cable connection) for this assembly. They wanted a 3.5 mm connector button to match a cable they already owned. They accepted the previously used 2.3 mm size as a fallback.

Mr. Okada replied that he lacked the requested connector size, so work had stopped. No matching product can be confirmed on the current list. The diary does not record whether the order was completed.

(Source: ok-lab's diary, published September 2024)
https://ok-lab.hatenablog.com/entry/2024/09/21/122907

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Buying from outside Japan

OK Lab ships internationally to countries covered by Japan Post's EMS courier service. Overseas orders are paid in advance by PayPal. Each order carries a ¥400 (about $3 at ¥156 = $1, rate as of 2026-09-04) handling fee, and EMS shipping is charged on top. These terms come from OK Lab's official sales-terms page (written here as plain text, not a link: ok-lab.net/docs/law), checked on September 7, 2026; confirm them on the official store before you order, because they can change.

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Summary of this article

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Source: ok-lab's diary (Okada Comfortable Life Laboratory). The original entries are in Japanese; quotations on this page are translated. Photos and videos are on the original entries.