I will ask my pediatrician at tomorrow's appointment about the tea tree oil, that's a great idea! I hope he says it's ok! I am washing a load right now, so I'm going to keep an eye on them really closely when I hang them out to dry. I don't leave the clothes out long enough for the eggs to hatch, so I'm not worried about the larvae eating the clothes. I just don't want my girl to eat the eggs!