I don't have any frizziness at all. My bonnet drying/airdrying technique depends on the size of roller I use. If I'm rollersetting to straighten, I set my hair on gray and purple rollers early enough in the day so that my hair has about 8 hours to bonnet dry/airdry before bedtime. (Since these rollers are so big, I don't try to sleep in them.) Then I remove the rollers, put my hair in a ponytail, roll the ponytail on one magnetic roller and tie my hair down with a scarf.
If I'm rollersetting for curls, I set on 1" rollers, bonnet dry for 45 minutes, then finish airdrying overnight. I can sleep very comfortably with this roller size.