All the underwear I have is used; I only get new ones a couple times a year. I wash them after every use and they stay pretty serviceable for a long time. Janis’s problem is what I have heard called being “ritually unclean.” In those cases nothing can remove the stain of whatever the problem is. If I use glass kitchen bowls for holding automotive fluids they are Unclean forever – we can rely on the dishwasher to remove dog slobber but not brake fluid. It makes me wonder if washing the same stuff off my hands with hand soap leaves me forever unclean. I’ll have to ask Lady Macbeth about that.