Rash ointments cause our underwear to repel and not function properly. If you mistakenly get rash ointment on your underwear, wash them normally and then apply some dishwashing liquid, like Dawn, to the affected area. Scrub the affected area lightly with a toothbrush or other bristle brush. While this is a suggested method, it may not always work. Underwear that deteriorates due to rash ointments is not covered by our warranty.