Actually, your signature didn't show online when I looked. It does now. My hair is also fine/low porosity. It doesn't care for straight oils/butters, but likes them in well formulated products.
My mother lives in FL, so I have an idea of what your dewpoints are like--the worst days of a mid Atlantic summer. In the really high dewpoints, I use a leave in OR curl enhancer (meaning one layer) with a jelly product. My hair doesn't care for the chemicals in gels, especially the polyquats. Try using a minute amount of a really rich product that takes a while to absorb and follow with a jelly/gel.
Because my hair is low porosity, it's frequently dry before the products are absorbed. My hair gets better as the day goes on.
3a (Corkicelli), highlighted, fine, low porosity
modified CG, since April '07
CG since 3/11/08
HGs: Curly Kinks Satin Roots, Curlycue ReNew and Coil Jam; homemade FSG and okra gel; soap bars; DM MiraCurls Curling Gelly; UFD Curly Magic; Shescentit LIs; Sevi conditioners; Botanical Spirits Puree, CJ Repair Me