LOL it's the absolute worst, about 6 months I ago I had a couple in here for wet testing, nothing out of the ordinary the wet test was at the very end of the day and only took like 20 minutes. The next day I come in and open that spa see what looked like a solid 1/2" thick mud ring around the water line, I've never seen something so nasty, that cannot be healthy for your skin or pores to apply that crap to your body can it?