My son, my sister and I currently using Hes hircismus cleaner, 3 of us don't have any problem what so ever, it works well and my 15 year old son said, can't havve a normal social life without this bottle. we just put it on and never wash it (of course you clean your armpit too in the shower :-)). Note: DO NOT SHAVE or USE TWEEZER TO REMOVE ARMPIT HAIR !!(cuts can cause rash when using the solution). HAIR REMOVER IS RECOMMENDED.