Since my hair gets so dry, I was thinking I'd apply Kinky Curly Knot Today as a leave-in after rinsing out the deep conditioner, then applying some sort of heat protectant serum, blowdrying, then applying a spray-on heat protectant as I flat iron. Does anyone know of the best heat protectants for a) blow-drying and b) flat ironing? I've heard good things about CHI and Rebken, but I don't want anything that will weigh down my hair or make it oily. Thanks in advance!

*BONUS QUESTION:* What do you apply to your hair throughout the week to keep it moisturized without making the hair oily? Also, where do you apply it? Ends, scalp, both or all over?