My hair is very fine, too. I stopped using gel when I went with more natural products last Sept--had to add it this winter because the cold, dry weather pulled them out. Since you're using products with a lot of hold, I'm thinking moisture??? I don't use KCKT because it's not moisturizing enough for me. You don't say what you do for cleansing. I found that natural soap bars, instead of cowash, tightened my curls and added volume.

The other thing is diffusing or the hard bonnet dryer that's being talked about to set the curls better?

Those are my ideas. I'll be interested in what advice you get.
3a (Corkicelli), highlighted, fine, low porosity

HGs: Anything Sevi; Curly Kinks Satin Roots, Curlycue ReNew and Coil Jam; homemade FSG and okra gel; soap bars; UFD Curly Magic; Botanical Spirits Jellies, CJ Repair Me, Aloe Fix