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.
1 If pay using Paypal, please check out the optional money back guarantee offered by Paypal. 2  Neilmed Sinus Rinse Premixed Refill 250 Packets. 3  The expiration date of these packets is May 2018.  All have been kept in a climate controlled home, pet free and smoke free.