You should describe your set up as well as tell us your actual temps, how many hides are there and are they the appropriate size, etc.. Every time I have had had a bp go on a fast, husbandry was playing a roll, or needed to be adjusted to end the fast. Insecure or stressed ball pythons will refuse to eat. Correct the source of the stress and you should have results. If your set-up is appropriate and your temps are ok, but not approaching the upper limits, increasing the overall temps by a few degrees may help. Good luck.