My hair does not retain heat like it use to. Idk if I'm happy or sad about this! I straightened and curled my hair after…

My hair does not retain heat like it use to. Idk if I'm happy or sad about this! I straightened and curled my hair after not doing it for a few months and the curls won't stay. Guess I'll go back to being natural. I don't want to put excessive heat in my hair I've been doing so good without it. Now I will have to go to the hair salon when I want a blow out or curls 😕