Thick & straight hair Looking to Upgrade my hair care routine! Looking for recommendations

Hi all! I have naturally thick, straight hair that I want to take better care of! I have a fading balayage that I’m probably going to get redone in the spring and currently use L’Oreal Elvive shampoo and conditioner. My old Revlon straightener also seems to be slowly dying, and would love one that doesn’t take multiple passes to straighten after letting my hair (completely) air dry overnight. Admittedly, I also don’t use heat protectant as much because most products I’ve tried in the past have felt too sticky or left residue in my hair.

TLDR: would love straightener and thick hair maintenance product recommendations!