I sprung for that pricey CHI heat protectant, I had my flat iron set at 300, and the result? SUPER SPLIT ENDS. For the whole time of my healthy hair journey, I avoided heat like the plague and I had zero splits. Then when I flat iron, even using the stupid heat protectant, it's split city. I mean hairs that have a centimeter-long split at the bottom, and each "wing" of the hair is also split! I had to cut off the stupid splits and I'm feeling My goal was to reach waist length in my longest layer by my 30th b-day (mid-june) and now I don't think I'll reach it. I'm gonna put that stupid flat iron AND the useless heat protectant on the barter board and bid them both adieu... good riddance!