I got my XP DEUS out this morning and noticed that it has a round dark spot on my screen about the size of a pencil eraser. I just put it on charger to charge it and have not turned it on yet but the screen is not damaged and it had been stored in my bag all winter. Does anyone have any idea what may have caused this? It was not there the last time used in September 2017. But it may cause me a problem in viewing complete screen. I will post another message after I have charged remote...