What should I pay attention to when wearing swimwear in the hot tub?
Swimwear worn in the whirlpool should not be washed with detergent in the washing machine. The detergent residues in the fabric can be partly responsible for the formation of foam, as detergents contain surfactants. These are washing-active substances that form foam. You are probably familiar with this effect, for example, from washing dishes by hand: as long as the water is foaming, you can still wash more dishes, so there is still a cleaning effect. Once the foam has disappeared, the grease is no longer dissolved.