My only concern is that you're leaving the hairs on other areas besides your face there for too long before you come in for treatments. You shouldn't let the hair be there for more than 3-4 weeks before it gets treated. Otherwise, it's pretty much a wasted treatment as you're not getting the hair in the anagen phase. That may be why it's taking a while on the nipple area for example. Treating the hair in the right phase is of ultimate importance.