If you’ve arrived here after Googling “how to clean a watch,” congratulations: That means you actually wear that beautiful timepiece of yours, rather than merely leaving it tucked away in the safe.

The Apple Watch does a lot, which can be a blessing and a curse. Perhaps its most popular features are its various health-tracking technologies that have become common in most modern smartwatches.

If you’re reading this, it’s probably past time to clean your watch. Timepieces get a front-row seat to our lives and are exposed to lotions, sweat, perfumes, colognes and everything else we encounter ...