Got a tip for these hot humid nights, buy some Deep Freeze Gel and smooth over feet and ankles and a little on the back of your neck, make sure you don't rub the eyes though.
It really cools you down especially at bed time and also helps with aches and pains.
If you want something that smells nice and works ( but is not as cool) then Boots Cooling Foot Gel with Mint, Arnica and Witch Hazel is very good. along with their Foot Spray with Mint, Witch Hazel and Cypress is really refreshing I get through loads of it during the Summer.