If you have straight hair and are trying to get waves, I'd stick to the curling iron. Better yet have you tried braiding your hair for waves? No heat means no heat damage.

Braided Hair: 6 Easy Steps To Celebrity Worthy Waves : Hairstyles | Hairstyles, Celebrity Hair Styles and Haircuts | TheHairStyler.com
|| 3b; normal porosity; fine/normal texture || CG since Feb 2010 || SD/dandruff prone

Current Routine BAQ henna 1/month Leave-in OH Hair Dew Cheapie Conditioner Tresemme Naturals Moisturizing
Old Stand-bys extra-virgin coconut oil Protein AO GPB; Moisture AO HR Style AOMMJ Kept for troubleshooting.
Waiting to try extra-wide curlformers SD treatment H&S Clinical Strength