After 3 months, my black sports band had a layer of built-up grime, especially on the wrist side. Washing with water alone did not help...
Dish soap worked pretty well (I used a soft sponge to scrub). It removed around 95% of the grime, but not all of it.
Is dish soap the best, or is there some other chemical I might try? Maybe I should use soap more often to prevent buildup?
Thanks in advance!
Edit: I see from an old post (below) that people have used vinegar, alcohol, and baking soda. I might try vinegar to get the rest of the grime, but I'm also wondering if there is anything to avoid. Warm water alone definitely doesn't work for dead skin/oil buildup, especially if you work out in your watch.
https://forums.macrumors.com/threads/how-do-you-clean-your-sport-band.1875489/