My daughter's both get large knots in their hair no matter what I do. I plait their hair every night but when they get up it's still in but hair is all over. I bought cantu hair shampoo and conditioner but makes no difference. I have 3 detangling brushes and combs. What can I do? My eldest especially has dry thick hair which even in the slightest wind goes all over the place. Maybe a really good leave in conditioner?