one word of advice, get some sanding on that bed, i have seen older windows with a cleaner look than that bed, and yes reduce the temperature plz, most of time you should have problems with ABS and Nylon, NOT from pla and specially no warping should happend, theres an small posibility that the bed is the source of the problem, that the print is not sticking to the bed and because of the excesive heat you end up with that warping, but again you should try what have been stated, hope it helps you out