Sonic Brushes: Guide to Open, Dry & Protect from Water Damage (Pre-Warranty Expiration)

Question

Welcome, Here is the last of two brushes that fell in the same way - from water :) The funny thing is that it's almost equal to the end of the guarantee. If any of you have one, I recommend opening and drying it because water is collected which destroys it over time. We open them by lifting...

maniek1979 · Accepted Answer

Nothing can be eternal, especially in these times. If not water, the plates or the battery will rise.
The eraser is designed for the right number of cycles. You can buy it from our friends from the Far East, you can enter Hq9332 in the search engine on aliexpress. Whenever I disassemble the brush for the first time, I secure it with a varnish for printed circuit boards and trim the locks so that the next time it is easy to take it apart.
https://pl.aliexpress.com/item/4000854081367....37.0&lscm_id=1007.12107.13-904.037.12908.13cm -4e54-a403-4ab6717b943b & _t = gps-id: pcDetailCartBuyAlsoBuy, scm-url: 1007.12908.131037.0, pvid: 98f05162-c47b-4e54-a403-4ab6717b943b, tpp_2308% 2361968% 2361968% 236128% 2361968% 2361968% 2361968% 2361968% 2361968% 2361968% 2361968% % 233 325% 2314_668% 232 846% 238 114% 23 702_668% 232 717% 237 566% 23831__668% 233 374% 2315 176% 23 539

WędkarzStoLica · Answer

I wash the teeth with a paste and not with water I would not call it the tip of the day; p

kortyleski · Answer

I do not know how this water is going to get there. I wet the brush head, apply the paste and brush my teeth. After washing, I disconnect the personal part of the device, the drive lands on the charger and the tip is broken and put in place. The splash-proof drive has practically no contact with water ...

Eliel · Answer

I saw on YouTube a movie on which the entire interior of the brush was packed into a condom and then closed back in the casing. Unfortunately, the condom broke apart after the first application of the brush head on the metal pin. The author of the film claimed it was nothing, but I wonder if it would not be possible to polish it a little bit and put on the condom a bit differently, not on the whole mechanism together with the pin, and below the pin. How do you think - can do this and do not spoil the brush? Greetings.
https://youtu.be/7ydf9YrU_d8

foxxer672 · Answer

I think it's a good idea, tie the tip below the pin, for example with a line, and it should be fine.

zdzisiek1979 · Answer

You will not make a shit with a shit. They were not invented to be eternal and prevent caries.
It's just a gadget for the lazy ones. You can not avoid the dentist.

You buy miracles thinking that you are a bullet and then you can not afford it again? It spoiled itself, it is buying a new one and not putting it in the condom. Great fun. The condensate will not evaporate and it will not evaporate.

The very picture tells us that it is a gadget what should be broken why? No protective coating on the PCB to protect against moisture.
We simply have producers that plan to break down already at the design stage.

A professional product would have been flooded with a pickle and the switch would be on a reed with a magnet that would not corrode the contacts of the switch. In a word, such a construction would be eternal. But it can not be so because it misses the goal of economics.

gimak · Answer

I have been using such toothbrushes for at least 14 years. The first one served me for about 10 years and is still running, but without a rechargeable battery. It is powered from the power supply and is used to clean various trinkets. At that time she was cleaned several times. The second one has been used for about 8 years and has not been dismantled yet. When cleaning my teeth I try to keep it in a horizontal position. After brushing my teeth I always rinse the brush (tip) under the water, take off the tip, and from the support of the drive shaft, shake the water by flicking the brush body several times.

music · Answer

Irrigator is even better.

misiek1111 · Answer

Unfortunately, these Philips are a sell. In the first versions, this rubber bellows rubbed between the metal vibrating pin and the brush. As a result, the water was coming in. Of course, Philips does not offer any brush parts, because for what.
In later versions, they put a plastic cover on the elastic band and the problem was significantly reduced.
I have already patched this electronics 4 times.
In one of them fatigue of the material in the vibrating blade and burst ...
Do not put it vertically, because the water pulls through the thin O-ring from the bottom and floods the electronics, which of course is not even painted. Therefore, the brush should be placed horizontally, and the o-ring should be cleaned and smeared with Teflon grease once in a while.

In total, I made one of the three brushes, which has been amazingly working every day for 2 years.

wasylekwawa · Answer

I managed to find this rubber gasket on Ebay. I can not post external links so I give the name of the listing: Electric Toothbrush Waterproof Sealing Parts Rings For Philips HX6730 HX6930

misiek1111 · Answer

Auction: 232370149058 on ebay.com

One more thing. It's black on the elastic, it's not dirt. This is the "disease" of the gum, or its evaporation. The reason is one - the mixture used by the manufacturer aims to shorten the life of the gasket. For me, the first spots appeared after ~ year.

gkasprow · Answer

in my crack a gasket and water got under the PCB.
Etched eyelets at:
- button
- driver H
- processor
After soldering the 0.25mm wire into the vias, soldering on both sides and replacing the gasket, the brush opened.
Seals are on Allegro for PLN 28

Anonymous · Answer

If they spoil by water, can dry teeth cleaning? A mammal of saliva in the mouth (like at a dentist's), then some fan or dryer and clean it.
In the case of other brushes, you can use the methods used in the past - charcoal, ash, salt, soda or sand. In extreme cases, 1000 sandpaper; with thinner ones it can also be cleaned between the teeth.
The dentist will not prevent tooth decay. He just cuts it out and covers it with putty, just like a tinsmith removes rust and puts a putty knife. The dentist does not apply varnish.
You have to take care of your teeth yourself.

gkasprow · Answer

Could you speak on the merits? The thread is not about tooth cleaning techniques or dental advice, it is about brush repair. I reported to the moderator.

Anonymous · Answer

I have reported water resistant variants. If a colleague does not understand it, it is difficult.

gkasprow · Answer

yes, which one time in turn. Yesterday I already read it. This is called spamming because nobody here is interested in such variants, but only in repairing the toothbrush.

Anonymous · Answer

Any time in turn? this is the 3rd post in this thread. Something my colleague is wrong. all three written today.

gkasprow · Answer

Coming back to the topic, I plan to flood my PCB with Contact. I have 2 more such brushes and I do not want them to die.
Do you have any other idea to protect the PCB against corrosion? Best proven.

Added after 1 [minutes]:

Awyrdonyt wrote:
Any time in turn? this is the 3rd post in this thread. Something my colleague is wrong. all three written today.

and did I write somewhere that it was your post? Stick to the thread please or go somewhere else to advise.

Anonymous · Answer

How to avoid water splashing inside the sonic toothbrush? Below, I will present the methods available for the average DIY enthusiast.
1. When using the sonic toothbrush, avoid contact with water or its solution. There is no water, no problem, because there is nothing to penetrate inside the device. Remove excess liquid from the mouth with a mammal used by dentists, or intensively ventilate the oral cavity causing the liquid to evaporate before it enters the brush.
2. We seal the brush in any way:
2.1 We wrap the brush with adhesive tape. Gray, silver, insulating or colorless as a last resort. The latter has the worst glue and will peel off quickly when exposed to moisture. Patients can change it before each use of the brush.
2.2 Cover the brush housing with glue. It can be cyanoacrylate glue, it can be epoxy. You can weld the sides of the housing with a soldering iron, pour hot glue. Compared to wrapping in a tape, it will be a plus in the form of greater aesthetics of the device and easier start-up, because the switch / switch will be available in its permanent place without intermediate layers of foil with adhesive. You can also use gearbox sealants or Butapren glue for gluing the housing.
2.3 Pour one of the electronics potting compound into the inside of the brush. Due to such a mass, moisture will not reach the tile. The mass will be able to dissipate heat from sensitive points and, as a result, the service life of the device should not be reduced due to modification.
2.3 Cover the brush with epoxy glue or epoxy resin. After hardening, such preparations are very durable, airtight, and they also prevent moisture from entering the printed circuit board. The bonus is the strengthening of the brush - from now on it will be much more resistant to mechanical damage. Any repair will require the removal of the resin, which may result in an additional fault. The resin cannot contain fillers such as powdered graphite or metal filings, as under certain conditions they can start to conduct electricity, rendering the brush inoperative.
2.4 Hydrophobic agents - this is one of the most modern solutions. These agents repel water, so when they coat the case, water should not penetrate the interior. In such a case, you can moisten the inside of the brush, and above all the printed circuit board, with WD40, which was designed to protect various devices against moisture.
2.5 The interior of the device is additionally filled with a moisture absorber. Even if water gets there, it will be captured by the canister.
During all these operations, be careful not to block the moving parts of the device.
2.6 We store the sonic toothbrush in the factory packaging, away from moisture, preferably in the store where it was put up for sale, and before you buy it.

misiek1111 · Answer

Nice essay, but could you please clarify:

Ad.2.2 How should I stick the housing in place of the rubber gasket? The seal vibrates and the adhesive breaks, or too stiff adhesive will immobilize the head.

Ad.2.3; 2.4; 2.5 How to pour the sealing compound or other things so that the moving parts, i.e. buttons, electromagnet and moving mechanics are not flooded, which will immobilize them.

gkasprow wrote:
Do you have any other idea to protect the PCB against corrosion? Best proven.

I listed it in # 9. The plate can be protected with varnish, but this will not protect the brush from damage in case of flooding. In addition to the electronics, there is also a mechanic that is also not resistant to water.

Anonymous · Answer

Plumbers have the answer - silicone. Flexible, fungus-inhibiting, waterproof. Buttons should of course be protected against flooding. Everyone has to work out the details alone or in a team. I use a toothbrush that is not afraid of water, so I have no material for testing.
We only flood the plate. The engine and interior may be wet.

Sonic Brushes: Guide to Open, Dry & Protect from Water Damage (Pre-Warranty Expiration)

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