guys...got a dilema tongiht. im dumb-tired so wanting to go to sleep soon. any length i should wait after applying my ph, before lying in bed? how much is gonna rub off onto the sheets? if its a good amount of time i have to wait, how about skipping this appliction (this my 4th day on it, and today has been my day off)....i dont think the second option is a good one. curious how long i should wait after app.