Hand washing. Hand washing, also spelled handwashing and known as hand hygiene, is the act of cleaning one's hands for the purpose of removing soil, dirt, and microorganisms. This may be done with or without the use of water, other liquids, or soap.
Sunscreen does expire. The molecules in suntan lotion (such as homosalate and octyl salicylate) block the penetration of UV radiation by acting as filters and absorbing and reflecting high energy UV. Over time these molecules break down and lose effectiveness, kind of like expired cold medicine or vitamins.
Choice Hotels rewards, known as Choice Privileges points, expire on Dec. 31 two years after they are earned and placed in your account. They could expire earlier if your account is closed for inactivity. Choice Privilege accounts can be closed if there is no activity for 18 consecutive months.