I'm not up do doing stuff like that at the moment, but I have figured out a few things to keep myself cool in the summertime.

Bandannas. I was told a neat trick several years ago. A wet/damp bandanna wrapped around your wrist can trick your brain into thinking that it's cooler outside than it really is. Also putting one on the back of your neck can trick your body into thinking it's cooler.

Making sure you stay hydrated. Yeah, when you've got potty issues, that one's kind of a trick too, but if you stay hydrated, your body is better able to cool itself, but then you have to make sure that you're able to get to the potty when you need to too, since you're drinking water/other liquids.