The foam in a hot tub is caused by skin shavings and sweat.
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Scary Facts
RandomWow I'm just pumping out these books... Any Houdini, hello everyone and welcome to Scary Facts! These facts can range anywhere from facts about haunted places to scary facts about objects in your home. And while they may not be SCARY for some people...
Hot tubs
The foam in a hot tub is caused by skin shavings and sweat.
