Metal: remove the strap, add an appropriate amount of detergent in hot water, soak for 10 minutes, and then brush with a soft toothbrush. After that, rinse with clean water and dry with electric hot air blower.
Plastic: add an appropriate amount of detergent to hot water, soak for 10 minutes, and then brush with a soft toothbrush. After that, rinse with clean water and dry the watch strap in the shade.
Cowhide: first wipe the dirty part of the watch strap with an eraser. Because some dirt is floating on the surface of the strap, if you wipe off part of it first, the follow-up work will be easier. Wet the dirty part of the watch strap with a soft cloth. Don't pour water directly on it. That will damage the leather and easily cause the deformation of the watch strap. Apply a small amount of toothpaste to the dirt and brush gently with a toothbrush. Brush according to the texture of the strap, just like brushing your teeth. Wipe the toothpaste foam with soft cloth and then drain the remaining moisture on the watch strap with paper. If there are still stains on the watch strap after drying, you can brush it several times. Check whether there is dirt left on the strap. If yes, you can wipe it with an eraser. If it is stubborn dirt such as gum, you should go to a special place to clean it. Don't pick it hard, it will break the skin. If there is stubborn dirt, wipe it gently with a soft cloth dipped in a little alcohol. Alcohol has a strong cleaning effect, but there are certain conditions, so you can try to use it.
