I have racks witht he same tubs...had a few chew outs over time
new racks will use these (cheaper, better quality)
http://www.webstaurantstore.com/21-2...0%20%20BK.html
worst case scenario
angle a box fan directly in front of the rack so the air is focused on the top of the rack. Should lower temps unless exceed 100
humidity is more of a factor than anything else is btw.