Extra Swimsuits and Towels for Guests: This may seem like “going the extra mile,” but it’s a lifesaver for your hot tub water. People forget their swimsuits, and they may be tempted to soak in your hot tub with their street clothes on – that’s a recipe for disaster. Any number of things can be on their clothing, which then go into your hot tub water. Simply offer them a swimsuit. It’s easy – have a few one-piece stretch suits for women in small, medium and large, and a few swim trunks for the guys. In late summer, swimsuits are often on sale. Ditto for the towels. You be the host who’s extra hospitable!