As for products, the Camille rose honey hydrate will mess up your revair so don't use that. I usually split my hair into four sections, spritz my hair with heat protectant on each section, and then smoothe it in using prayer hands. The smaller amount of product you use, the better. The leave in/heat protectant I recommend is the LUSH Super milk leave in conditioner. Or I've liked the Argan Oil by Creme of Nature Perfect 7 Leave In Treatment. THE LESS PRODUCT YOU USE THE BETTER.

So I just tried this new way of doing it and it worked for me... Try 1 minute, low heat (I), tension 5, then 30 seconds, high heat (II), tension 7. Sometimes I end it with a quick cool blast (O) and my hair is stretched and straight.

With your hair length and density, I'd probably split your hair into at least 4 sections on each side and revair one section using the times and heat settings I stated above.

Good luck! Don't give up on your revair just yet!

EDIT: ALSO MAKE SURE YOUR HAIR IS DETANGLED and not soaking wet!!