Here are 2 ideas That I tried and both seem to work for me.
1 let up all the cords and when the seal between skin and shell has
been released dust in a bit of baby powder and this will let the skin
just slightly slip and not drag on minor tight spots , what this will
do for you is allow the entire head to apply the same amount of
tightness and not keep one side or the other under stress.
2 start using slight amounts of hand lotion before you play, then
after you play more and more it gets to where the head will bound on
a respectfull tone.
good luck, enjoy, smile