I am making a cake for a b-day tomorrow. I covered the cake in fondant and stuck it in the fridge (which I have done before). When I took the cake out it is starting to sweat and has a slimy film on the fondant 
. Is it because it is warm here (in the 80s and I do not have my air conditioning on). Is this ok? Will it stop? How do I fix it? Will it go away? Would it help if I turned my air conditioning on? Thanks for any help!!!
Yes, the condensation is due to the temperature change. Whatever you do, DO NOT TOUCH the cake!!! If you can place the cake in front of a fan, that would be ideal. Worst case, the condensation will leave drip and/or water spots.
Cake decorating in the summer is always a unique challenge. So many times I've wanted to just take my shingle down from May to September. Grrrrr!
Is there a reason you put it in the fridge in the first place? Do you have a perishable filling inside?
If I am keeping a fondant covered cake in the fridge, I will put it into a box first which helps with the moisture. The box will absorb it and your cake shouldn't sweat as much. But if it does sweat, just leave it without touching it and it will eventually dry as it comes to room temp.
There is not a perishable filling in it. I just figured with the heat and humidity that it would not be fresh if I left it out. I am a novice cake maker so not so sure. The cake was baked last night and she is picking up tomorrow around noon so would it be okay to leave out?
As the others have advised, leave it out of the refrigerator.
Refrigeration will actually cause your cake to go stale faster than leaving it out at room temp. That said, you should probably get the temp in your house down to at least the mid-70's. This will make handling the cake a lot easier and safer.
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