my daughter is 4 yrs old.. she is having lice n nits on her head.. iam using perlice shampoo once in a week. but again the lice n nits appears iam very much fed up.. please suggest any good lice shampoo... n which oil should I use neem oil??. which brand.. any other oil like olive oil or almond oil.. please dr. suggest me.. iam very much worried. she is developing dry skin flakes beneath her ears. iam worried is it due to perlice shampoo? that is a strong chemical shampoo for lice..