Good heat protection???

My hair used to be extremely curly but due to a bad hair treatment it is now frizzy and unmanageable. I have to straighten it everyday to make it look half decent but due to this it snaps. I'm in a catch 22 because my hair is looking bad because Im straightening it but if I dont straighten it it looks worse. I was just wondering if anybody knows of any really good heat protection sprays on the market or anything to make it stronger??