Boiling or alcohol for cleaning the chip? | The maker favors boiling for newer resin [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 "boiling vs alcohol disinfection" 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.

---

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 different problems with boiling and alcohol, depending on the chip's material and construction.

Mr. Okada recommends boiling for the resin products discussed in September 2021 and January 2025.

The January 2025 material allowed supplementary alcohol disinfection, with a warning that deterioration remained possible.

---

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.

---

Before you read: key terms

---

What happens: boiling vs alcohol disinfection

The OK Prostate Chip is a small device placed in the urethra (the urine passage). These entries discuss boiling and alcohol disinfection as treatments for the chip itself, including its glass, resin, and attached thread. Their focus is how those parts respond to heat or alcohol, and what Mr. Okada recommended for the particular construction being discussed. The earlier glass-bonding reports and later resin announcements concern different materials, with different stated limits.

Boiling broke the adhesive bond in an early glass-chip trial

In an entry published in June 2018, Mr. Okada described unsuccessful attempts to keep resin attached to glass. Roughening the glass had not helped; he thought the resin separated even more easily than from smooth glass. An Aron adhesive trial initially produced a strong bond, but it failed during boiling at 100 degrees.

Mr. Okada wrote that the adhesive's official information gave a limit of 80 degrees. He therefore planned to move away from chemical bonding toward a construction held together by resin thread. His recommendation favoring alcohol instead of boiling concerned continued use of the adhesive-repaired design.

(Source: ok-lab's diary, published June 2018)
https://ok-lab.hatenablog.com/entry/20180602/1527922643

Alcohol disinfection and hot water raised different concerns in February 2019

In an entry published in February 2019, a customer reported increased peeling with alcohol in glass models but no apparent effect on resin models. The same customer reported shrinkage after hot-water exposure, which Mr. Okada accepted as a possibility. Mr. Okada described his own repeated boiling in a dedicated disinfection pan without obvious shrinkage.

He nevertheless recalled an earlier high-pressure boiling trial with 15% shrinkage and visibly thicker thread. He thought alcohol concentration might affect peeling; the entry records no outcome after his reply. He advised against prolonged alcohol exposure and suggested slightly longer threads for customers concerned about shrinkage.

(Source: ok-lab's diary, published February 2019)
https://ok-lab.hatenablog.com/entry/2019/02/09/152257

A storage report described alcohol disinfection without comparing its results

In an entry published in February 2020, a customer submitted a storage idea and mentioned liquid disinfectants instead of boiling. The named options were Oxydol (a product cited for disinfection) and disinfectant ethanol (the alcohol named for that purpose). Mr. Okada thanked the customer for sharing the information.

The diary does not record whether this approach prevented infection or affected the chip material. His reply contains no comparison establishing the customer's approach as preferable to boiling.

(Source: ok-lab's diary, published February 2020)
https://ok-lab.hatenablog.com/entry/2020/02/01/151232

Alcohol disinfection became possible with the second resin generation

In an entry published in January 2025, Mr. Okada announced second-generation biocompatible resin (the maker's term for the new material). The description said alcohol caused slower deterioration in this material, making alcohol disinfection possible, but explicitly did not promise freedom from deterioration. Earlier material versions were to remain on sale alongside the new ones until their existing stock ran out.

The diary does not say what the current state is. Even for this newer material, Mr. Okada recommended boiling and described alcohol disinfection as a supplementary option.

(Source: ok-lab's diary, published January 2025)
https://ok-lab.hatenablog.com/entry/2025/01/18/123007

---

The maker's answer to boiling vs alcohol disinfection

The maker's later resin descriptions favor boiling, with alcohol restrictions that depend on which resin generation is being discussed.

Boiling was the stated preference for early biocompatible resin

In an entry published in September 2021, the product description identified the material as acrylic resin (a resin type not explained there). It warned that alcohol disinfectants could damage this biocompatible resin (the material used in the products being discussed). Mr. Okada said the resin supplier in Spain had also confirmed that prolonged alcohol exposure was unsuitable.

Staff were testing repeated spray exposure, with about 1,000 repetitions planned before reporting results. The entry does not record the outcome of those tests or establish that spraying avoided deterioration. For those resin products, Mr. Okada's published recommendation was boiling, and the description advised against alcohol disinfectants.

(Source: ok-lab's diary, published September 2021)
https://ok-lab.hatenablog.com/entry/2021/09/04/125843

Non-alcohol disinfection offered a fallback when liquid treatment was unavoidable

The September 2021 product description also addressed customers who needed a liquid disinfectant. It pointed to a non-alcohol option and named Makiron (a disinfectant cited in the entry) as an example. The diary does not explain its ingredients or provide a comparison of its performance with boiling. Mr. Okada presented this as a fallback for unavoidable liquid disinfection, while keeping boiling as the preferred method.

(Source: ok-lab's diary, published September 2021)
https://ok-lab.hatenablog.com/entry/2021/09/04/125843

Alcohol disinfection needs kept an older stopper version on sale

In the September 2021 entry, Mr. Okada also addressed customers whose only available disinfection method involved alcohol. He said the earlier six-hole stopper (an accessory whose function is not explained in this paragraph) would remain on sale for them. No matching product can be confirmed on the current list. His response was to retain that earlier version as an alternative for customers unable to use another disinfection method.

(Source: ok-lab's diary, published September 2021)
https://ok-lab.hatenablog.com/entry/2021/09/04/125843

---

How boiling vs alcohol disinfection changed over time

---

OK Prostate Chip products related to boiling vs alcohol disinfection

No current product is directly tied to this topic.

---

Common worries about boiling vs alcohol disinfection

The reader inquiry asks for a reliable alternative, but Mr. Okada's reply acknowledges the limits of his experience.

"Is boiling better than alcohol disinfection for the chip?"

In an entry published in June 2019, a customer with past urinary inflammation asked whether boiling was the best disinfection method. The customer also wanted an easier or more reliable alternative to commercially available alcohol, following earlier correspondence about a vibrating chip. Mr. Okada replied that he had an alcohol allergy and lacked practical knowledge of alcohol disinfection.

He mentioned the disinfectant used during his own surgery, without recommending it for this device. The diary does not record which method the customer later chose or whether the concern was resolved.

(Source: ok-lab's diary, published June 2019)
https://ok-lab.hatenablog.com/entry/2019/06/22/123034

---

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.

---

Summary of this article

---

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.