What Should You Never Use To Clean A Watch?

The internet is full of watch cleaning advice, and a distressing amount of it will damage your watch. People mean well. They Google "how to clean a watch at home," find a forum post from 2011, and twenty minutes later they're scrubbing their Submariner with something they found under the kitchen sink. So before we talk about what works, let's talk about what doesn't, and why some of the most common household cleaning methods are quietly ruining watches everywhere.

Alcohol wipes and isopropyl alcohol.

This is probably the most common mistake because it feels like the right move. Alcohol cuts grease, your watch has grease on it, job done. Except isopropyl alcohol is a solvent that strips more than just oil. It degrades the gaskets and seals that keep your watch water resistant, dulls polished finishes over time, and can damage coatings like DLC and PVD. One wipe probably won't destroy your watch. But make it a habit and you're slowly compromising the seals that protect the movement, which turns a free cleaning hack into a very expensive service bill.

Household cleaning products.

Windex, bleach, bathroom spray, kitchen degreaser, whatever's in the cupboard. These are formulated to strip grease from tiles and benchtops, not to be gentle on polished gold or brushed steel. Most contain ammonia, bleach, or abrasive compounds that will dull your finishing, strip protective coatings, and potentially discolour certain metals. If it's strong enough to clean your shower, it's too strong for your watch.

Toothpaste.

This one comes up on forums constantly, usually recommended for polishing out scratches on crystals. Toothpaste is a mild abrasive, which is why it works on your teeth and why it will absolutely scratch polished metal and coated sapphire crystals. Some people get away with it on acrylic hesalite crystals, but it's a gamble, and it has no business going anywhere near your case or bracelet.

Paper towels and rough cloths.

They feel soft enough in your hand, but paper towels, tissues, and regular cotton towels are all far too coarse for polished watch surfaces. They'll leave micro-scratches that you won't notice until the light catches them at exactly the wrong angle, and then you'll never stop noticing them. The only cloth that should touch your watch is a proper microfibre designed for the job.

Ultrasonic cleaners (with caveats).

Ultrasonic cleaners aren't inherently bad, and professional watchmakers use them during servicing. But they use them on disassembled components under controlled conditions, not on a fully assembled watch sitting in a plastic tub on the bathroom counter. If your water resistance seals have degraded at all, and unless you've had them tested recently you genuinely don't know, the vibrations can force water past compromised gaskets and into the case. At that point you're not cleaning your watch. You're flooding the movement.

Jewellery dip solutions.

Those little jars of blue liquid you see at the chemist are designed for rings and earrings, not for watches. Most contain ammonia-based solutions that are far too aggressive for watch finishes and can damage lume, dial paint, and gasket materials. The fact that it says "jewellery" on the label doesn't make it safe for a watch.

Steam cleaners.

Some people swear by handheld steam cleaners for watches. The logic makes a kind of sense: hot steam should cut through grime effectively. And it does. It also forces high-pressure moisture into every gap, join, and seal on your watch, which is exactly where you don't want moisture going. Even on a watch rated to 100 metres, the seals were designed to handle static water pressure, not directed steam.

Final thoughts...

Your watch is an engineered product made from specific materials with specific tolerances. It deserves a cleaning product that was designed for those materials, not whatever happens to be within arm's reach. A purpose-built watch cleaning kit like Heist uses a pH-neutral, all-natural formula that's safe on every material watchmakers use, from steel to gold to ceramic to rubber. It costs less than a single cocktail at a hotel bar and it'll keep your watch looking the way it did the day you bought it. There's really no reason to risk the household stuff.