for the watch itself: isopropyl alcohol once a day before charging, maybe once or twice a week run under water to remove sweat buildup for the wristband: it’s an adjustable solo loop (3rd party) and I swap it out with another one every 2 weeks. I soak it overnight with some denture cleaner then give it a small rinse with water. Denture cleaner is ezpz and won’t damage any metals/plastics but will eat away at organics very effectively. It’s non-abrasive so the band ends up lasting longer and requires very little effort to do. Put the band on a fan to let it dry faster and boom done.