It's Summer in Australia, and the heat is hot in my area. I keep my 3 DS's stacked on top of each other (DSi on the bottom, 3Ds in the middle, XL on top.) in front of the shutters. Today, I picked up my XL and saw some drops of some sort of liquid on the 3DS. The 3DS worked fine, and I wiped the stuff off... But I think that has to do with the heat since I've heard that heat can melt DS's.
How can I stop the heat from effecting my DS's?