I have an rmini that has started to become really hot when I'm using it. I'm not doing anything different with it and I did not have this problem before, I'm using the same apps and just as much as I always have. It gets so hot that it's uncomfortable to hold, and I need to have it resting on a pillow in front of me or something so that I don't have to touch it. I now regularly stop my use to put it down on a cool surface to let it cool down. Why has this started happening and what could be some possible solutions? It's really bothering me.