I know, seriously annoying. Its 87 here, feels like 100 somehow. Girls are not impressed. I put out a pan of water with a frozen water bottle and they like wading in the water and drinking it. Even the girls who dont like water end up perching on the side and dipping their toes.
Im thinking about misters, I will have to ask you about your setup.
Harder for me is cooling down the coop before bed, which is 92 right now. I have one of those quaker coops which I thought was great cause a person can stand up in it, but it has horrible ventilation and NO cross breeze. Or at least where we set it up has no cross breeze. I would do a few things differently next time.