the company i work for services many trader joes stores. and it seems like almost once a month i come across a store that has every single deck coffin freezer case in the store sweating on the bottom of the cases and then drips onto the floor under the case and then rolls onto the sales floor. the cases are mostly hill phoenix, model- onzd12/8. at first i thought that the insulation was shot on the bottom of the cases. i would install squirrel cage fan motors under the case to move some air and it would be a quick fix. but now i came across a store that is 1 1/2 years old and these cases are ALL sweating from the bottom of the cases. the cases are not iced up in any way. has anyone else come across these cases doing this and what could cause it.