Re: OMFG!! EXOTICAS
That's strange, but I fully understand what happened. I've had Exoticas behave perfectly, then at other times a coal does like yours did, shatter into little pieces - EVERYWHERE! I'm not sure why some sticks do this, out of the same box - the top air exposed one are BEHAVING better than the bottom sticks.
I share your pain, I rent as well and have several LARGE burns in my carpet. I figure when we are ready to move, I'll cut a patch out from one of the closets and repair the burns (putting the burn spots BACK into the closet). You might want to consider something like this for your burns as well.
Good luck and sorry dude.