i used heat alot, hot rollers,flatirons,curling irons... for a year or two. i couldnt figure out why my curls looked so bad. less curl,dry,stringy.. i used alot of heat protection,great conditioners...so i thought everything was ok. i had my hair cut into a pixie last summer because i just couldnt deal with it. well,within a short time my curls popped back up. nice ringlets, or partial ringlets beause its so shortso my guess is your hair may be damaged a little.protien treatments,hair cuts,no heat may help.