I have a Synthetic skin 20" Remo Frame Drum and it seems that I have over-tightened one side on one occasion resulting in a sort of wave in the drum.
I have tried loosening everything and starting again evenly several times, however, the side that was over-stretched still has a light wave through it that affects the sound of the whole drum.
Have I ruined skin on this instrument or is there a way I can repair this?
Thank you kindly for help & advice.