I replaced both angle stops in my bathroom. That was relativly easy with only unscrewing the old , cleaning up the threads on the nipples[attached to a brass fitting attached to the studs], putting on teflon tape to the nipple threads and screwing the angle stops on. Everything seems fine except the hot water angle stop will have a wet spot under where the angle stop and nipple meet.I confirmed this with a sheet of tissue paper. It does NOT drip as I have had a bucket under it to check for that problem. I cant tighten it any more[almost 2 full turns] but I dont like this wet spot and dont know what to do. Help please