What a great experiment - I am going to start doing the same and seeing what happens - I need about 1 liter or a quart 32oz per hour and thats all year long - During the summer even more with salted fruit (yes in Texas we too salt our water melon) - Local sprinklers in the yard are also free game for me if I need a quick cool down...

Odd thing is that sometimes I am just burning up and other times even with the same conditions not as hot - Oh Well...