So I installed 2 rows of 22’s on a new client 3 weeks ago and she has really bad dandruff. She said it’s itchy and really flaky. I know she has been using drugstore shampoo but is now willing to switch. Is it safe for her to use Nioxin or anything like that? I also did 5 wefts on one of the rows and I’m wondering if it’s maybe just too heavy and that could be causing scalp irritation. Any advice is appreciated!