My hair has always been very thin/fine and goes greasy easily. In my mid 30's now and decided last year to chop most of it off to give it a chance at some volume, it's above chin length. When I wash and blow dry it, it looks great and full but by the very next day it is limp and greasy again no matter what I try, I use dry shampoo in between washing but I'm tired of it looking crap so I do wash it between 3-4 times per week so almost every other day. Now that it's short I can't even drag it back into a ponytail during the greasy day which is irritating. I've heard about "training" your hair by basically reducing the washing but how long would this technique take? I don't want to look greasy 😞 help!