My horse repeatedly kept pulling chucks of her mane out. I finally got tired of it being all different lengths and cut it all about 4 inches long but I want to grow it back out. Most people say MTG works really well but I am confused on how to use it. Could someone with experience in using MTG let me know how much to put on the roots of her mane, how long to leave it in and how much growth I should see per week? Also when washing out does any normal shampoo get it out?