Just wondering if this happens to any other brands or anyone else for that matter. I tend to vape pretty heavy when I pickup my 510,to the point where the atty is too hot to touch... I have noticed that the top of the cart where you drop liquid has a few spots melted. I looked at some other carts I use for the 510 and also semi melted. Idk if that's safe or not, hit me back very curious!