Apple Watches should be cleaned periodically in order to preserve their functionality. To clean the watch, turn it off, then remove it from the charger and band. Wipe the surface with a non-abrasive, lint-free cloth.
Lightly moisten the cloth if necessary, but avoid excessive water exposure. Alternatively, run the watch under warm water for 10 to 15 seconds. Do not use soap, cleaning products, compressed air, or external heat sources.
If the digital crown will not move properly, check for debris or substances (such as hand lotion) lodged in the gaps between the crown and the watch face. Then clean the watch with running water using the steps listed above, testing the crown as moisture clears out the gaps.
The band should also be cleaned periodically to prevent skin irritation. Clean the band with a non-abrasive, lint-free cloth. Do not soak in water, but light water should not cause any damage.