You can clean the wristband on the SmartWatch 3 using fresh water and a gentle detergent.
Note! Never immerse your accessory in salt water or let the Micro USB port come in contact with salt water. For example, if you’re at the beach, remember to keep your accessory away from the sea water. Also, never expose the accessory to any liquid chemicals. For example, if you’re washing dishes by hand using liquid detergent, avoid bringing your accessory in contact with the detergent. After exposure to non-fresh water, rinse your accessory, especially the cover for the Micro USB port, using fresh water.