[Unanswered]  Takara Stadium plastic warp fix?

Hi!

i have both takara B-09 and B-50 stadiums.
i noticed there is a bit of warp in the B-50...a few areas on one side where the plastic is somewhat uneven...its somewhat noticeable as beys travel across it.

i think maybe the dog stepped on it lol

ive tried massaging it out with my finger which has helped a bit, but i was wondering:

is there a tried and true method to evening out the plastic in the stadium?

thanks!
Someone before suggested using a hairdryer to heat the plastic up a bit and make it more malleable. Can’t say I’ve tried this myself tho.