Whatever you do, do not put over ten drops into your bath. I made the mistake of not measuring the ammount and I could only sit in the water for like 10minutes then my skin felt like it was being frozen by a dentist. But the next time I added 8 drops of tea tree oil and it worked like a charm. I am not sure that this tea tree oil will kill the scabies but it definetely puts me at ease more and allows me to sleep.
P.s - only use this stuff when you know your going to be around the house, tea tree oil has one of the worst smells ever and your friends and family will constantly harrass you about what that smell is