I started minoxidil 2 weeks ago and now I have a lot of big white flakes in my hair. They're probably dried flakes of minoxidil (I use Kirkland 5% liquid), but I have 3 questions for you guys. 1 -- If I remove the flakes with a hairbrush, scratching (not aggressively) my scalp, could this damage the scalp and/or follicles? Would this make things worse? 2 -- If I switch to foam, will there be less minoxidil residue? 3 -- If I switch from liquid to foam, should I expect a shedding period since I'm changing my regimen? What do you think?