ITA with rcc - summer does make for bouncier, plumper curls.
I have tried many different product combos in the past month trying to get rid of the drab lifeless curls. A protein treatment helped a bit, Curlisto application method helped somewhat, learned to not use KCCC
(which others find a godsend) as it drags my curls down but the biggest find is that I go to the sauna at the gym a couple times a week. The heat makes quite a difference. Mine is a dry sauna but if you have access to a wet one it would probably be even better.