Watches — water resistance is key
Cleaning a watch in an ultrasonic cleaner is the riskiest application among common items. The reason: if the watch is not sufficiently waterproof, water enters the mechanism = damage worth 200-2000 PLN depending on the brand.
One parameter determines everything: IP rating / ATM rating. Check it before the first cycle.
Checking water resistance — how to
On the watch case
Most watches have an inscription on the rim of the case back (where the snaps/screws are):
- WATER RESISTANT or WR — minimum 3 ATM (30 m)
- 5 ATM or 50M — swimming, shower ✅ ultrasonic
- 10 ATM or 100M — recreational diving ✅
- 20 ATM or 200M — professional diving ✅
- DIVER'S 200M — ISO 6425 diver's standard ✅
- No marking = NOT waterproof ❌
In the manual / online
Search the model in Google + "water resistance" or "IP rating". Apple Watch, Garmin, and Casio have this precisely documented.
Safety rule
If unsure, DO NOT use ultrasonic. It is better to skip than to damage a watch worth 2000 PLN.
Procedure — waterproof watch
What you need
- Vitaclean ultrasonic cleaner concentrate — 15 ml (1 tablespoon)
- Ultrasonic cleaner 600+ ml
- Lukewarm water ~25-30°C (hot water can damage rubber seals)
- Microfiber cloth
Procedure
- Remove the strap if it's leather or a replaceable silicone one (clean it separately)
- Pour into the cleaner 15 ml of Vitaclean ultrasonic cleaner concentrate + 600 ml of lukewarm water
- Place the watch in the basket (NOT on the bottom)
- Cycle 5-10 minutes
- After the cycle: rinse the watch under lukewarm running water for 10 seconds
- Dry gently with a microfiber cloth — wipe all crevices
- Check if the watch is working (second hand running normally, crown/buttons reacting)
- Reattach the strap (if it was separate)
Time: 8-12 minutes. Cost: under 0.60 PLN.
Safety table by model
Safe (confirmed)
| Model | Water resistance class | Cycle |
|---|---|---|
| Seiko Prospex (SRPE53, SRPC91, etc.) | 20 ATM (200 m) | 5-10 min ✅ |
| Seiko 5 Sports | 10 ATM | 5-10 min ✅ |
| Citizen Promaster Diver | 20 ATM | 5-10 min ✅ |
| Citizen Eco-Drive (most) | 10 ATM | 5-10 min ✅ |
| Casio G-Shock | 20 ATM | 5-10 min ✅ |
| Casio Pro Trek | 10 ATM | 5-10 min ✅ |
| Casio Edifice | 10 ATM | 5-10 min ✅ |
| Apple Watch Series 2-9 | 5 ATM | 5 min ✅ |
| Apple Watch SE | 5 ATM | 5 min ✅ |
| Apple Watch Ultra | 10 ATM | 5-10 min ✅ |
| Garmin Fenix 5/6/7 | 10 ATM | 5-10 min ✅ |
| Garmin Forerunner 45/55/255/955 | 5 ATM | 5 min ✅ |
| Suunto Core / Vector | 3-10 ATM | 3-5 min ✅ |
| Tissot Seastar 1000 | 30 ATM | 5-10 min ✅ |
| Steel bracelets (all brands) | N/A (no mechanism) | 5-10 min ✅ |
With caution
| Model | Class | Notes |
|---|---|---|
| Apple Watch Series 1 | IP67 | 3 min cycle, no more than once/month |
| Casio AQ (analog quartz basic) | 3 ATM | Short 3 min cycle, heavy use not recommended |
| Tag Heuer Aquaracer | 30 ATM | Safe, but expensive — prefer a jeweler |
UNsafe (DO NOT use ultrasonic)
| Model | Class | Reason |
|---|---|---|
| Swiss mechanical (Patek Philippe, Audemars Piguet, Vacheron) | Usually 3 ATM or less | Not airtight, sensitive movement |
| Antique / vintage (1950-1980) | None / 3 ATM | Old gaskets — not airtight |
| Pocket watches | None | Never water-resistant |
| Leather strap watches (entire unit) | Leather ≠ water-resistant | Remove the strap, clean watch separately |
| Smartwatches IP65 or lower | < 1 m | Not airtight |
Special situations
Watch after long-term storage (vintage from a drawer)
Haven't used the watch for 5 years? Rubber gaskets may have dried out. Even if the watch was water-resistant, it may no longer be. Safe procedure:
- Replace gaskets at a watchmaker (£10-30 estimated)
- Water-resistance test (sometimes included in the price)
- Only then use the ultrasonic cleaner
Swiss mechanical watch (Rolex, Omega)
DO NOT use a home ultrasonic cleaner. Professional cleaning at a watchmaker:
- Rolex general servicing: every 5-7 years
- Omega servicing: every 5 years
- Professional watchmaking ultrasonic cleaner uses specialized solutions (not Vitaclean ultrasonic cleaner concentrate) and different ultrasonic frequencies for specific movement parts
Smartwatch with health monitoring
Apple Watch, Garmin, Fitbit with biometric sensors (heart rate, ECG, SpO2). Sensors are under a water-resistant membrane; cavitation will not affect them. After a cycle, check if sensors are working normally (start a heart rate monitor).
Luxury steel bracelet (Rolex, Cartier)
Vitaclean ultrasonic cleaner concentrate is safe, but cavitation can loosen links (microscopic vibrations for 5+ minutes). For very valuable bracelets: use a watchmaker instead of a home cleaner.
Leather strap
REMOVE from the buckle before the cycle. Buckled straps — most watches allow this (steel buckle with a pin or micro-screw). Clean the strap separately:
- Damp microfiber + neutral soap (e.g., Aleppo soap)
- DO NOT soak the leather — it will swell and lose elasticity
- After cleaning, air dry, do not use a radiator
Frequency
Everyday watch (sport/smartwatch)
- Vitaclean ultrasonic cleaner concentrate cycle once every 1-2 months
- Microfiber daily (after shower, after exercise)
Special occasion watch (weekly use)
- Vitaclean ultrasonic cleaner concentrate cycle once every 6-12 months
Professional diving watch
- Vitaclean ultrasonic cleaner concentrate cycle after each session (sea salt damages steel, even with titanium parts)
- After a fresh-water rinse
Post-cycle — check
Crucially, check immediately after the cycle:
- Second hand moving normally (or screen turns on for digital)
- Crown turns smoothly
- Buttons respond
- Display clear with no signs of water under the glass
- Bracelet all links stable
If water is visible under the watch glass: IMMEDIATELY go to a watchmaker (~£20-60 drying service). Leaving water inside = movement corrosion.
Most common mistakes
3 ATM watch in ultrasonic — water will enter the movement. 3 ATM = protection against rain, NOT swimming or ultrasonic cleaners.
Leather strap in cleaner — leather deforms. Remove from buckle before cycle.
Full-strength Vitaclean ultrasonic cleaner concentrate — 1:40 dilution is mandatory.
30+ minute cycles — unnecessary for the movement; gaskets may fatigue from long vibration.
Skipping post-cycle check — you may miss water under the glass, and corrosion starts immediately.
Swiss mechanical in a home cleaner — damage can cost £200-1000 in Rolex/Omega service fees.
Related articles
- Ultrasonic cleaner — complete guide
- Cleaning jewelry in an ultrasonic cleaner
- Cleaning glasses with ultrasound
Related products
- Vitaclean ultrasonic cleaner concentrate — 1 L — for water-resistant watches 5 ATM+
Sources
- Vitaclean ultrasonic cleaner concentrate SDS (PDF)
- Watch manufacturers (Seiko, Citizen, Casio, Apple, Garmin) — water-resistance guides
