I diffuse everytime I wash which is about every 3 days. This is how I diffuse and it works for me. Except I don't twist my hair all the way around my head, sometimes just the clumps near my face. I also don't need to use the hairdryer to "calm my hair down" post diffuse. I just use my fingers to arrange the out of place curls. Then I'm done with my hair.

This series has other videos on curly hair, but I can't attest to them as I do not do them. I just diffuse this way.

Wet-Setting and Diffusing Curly Hair - MonkeySee
Hair: lots of fine 2c/3a
Length: Mid back
Shampoo:Shea moisture coconut hibiscus
Cond:, suave naturals coconut
Post condition/Leave in: Shea moisture smoothie
HG:L'oreal evercurl gel. AG: Recoil,