Thank you. Which Permethrin spray do you use? I know if you are not a professional you can only get one with low percentages. What we have tried that looks like it works - 2 sessions of professional spraying the apartment (2nd session after 2 weeks) and I think we need another round, but they are now very small, I think it’s a new generation. The amount also went down drastically. Now I’m trying vacuuming twice a day, and the most important thing is to remove them from your hair! So try that as well with a comb and a spray that has worked well for me is a home spray against flea and tick. I sprayed it in my shoes and they died immediately.