Soaps are made from fats that are combined with an alkali, like sodium hydroxide. They are effective at cleaning, but can be somewhat chemically harsh to your skin and strip it of oils. Detergents are like synthetic versions of soap, but designed for a specific cleaning purpose, and can be engineered to be less harsh and reactive. Facial cleansers are (usually) a kind of detergent designed to be so mild that it can be used frequently on your face.
So probably your strap won’t stand up to harsher chemicals like soap with regular cleaning. A facial cleanser is about as mild as it gets.
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