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Uh, foaming in the hot tub has nothing to do with fabric softener (a mild acid covered up by a nice smell) or detergent (it's gone, or you have a rash wearing your clothes).
The foaming and scum comes from a reaction between the chlorine or bromine and oils from our skin. It's a basic form of soap. It gets really bad on the walls of swimming pools where the girls (and guys) use baby oil, and they don't rinse off before entering the pool.
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James
The pessimist complains about the wind; the optimist expects it to change; the engineer adjusts the sails.- William Arthur Ward (1921-1994)
Red-beard for President, 2020
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