Currently trying a new combo on my wavy-curly hair: Charles Worthington Moisture Seal Hair Healer Leave-In Conditioner (in addition to the rinse off one I use after shampooing) & Elnett Heat Protect Styling Spray. Very pleasantly surprised with results so far

. Using these two together before blow drying, hair has been much more manageable, feels silky rather than coarse & so far no frizz, though yet to test in damp weather. I don't use straighteners, just a large diameter round brush. Time will tell whether this works well in the long term.