Hi, I store most of my TF's in the loft, but I worry about the heat. Because it gets pretty hot up there in the Summer, and I went up there today to put away some TF's back into storage, and pretty much all the G1's rubsigns were activated and looked green, ALL the time. Now, I bought down my G1 Powerglide a while ago (to compare to the Cyberverse one) and once back downstairs he cooled off and was seemed totally OK. A quick check of all the older ones doesn't seem to show any yellowing (that wasn't already there) or chrome flake/fade. Batteries are already removed after I discovered a lot of Armada/Energon was leaking. But even so, it does get warm up there... should I worry?