Is there a way I (we?) can make the leather grip tacky again? Mine has become very slippery after re-gripping my racket a few times using the same leather, and the grip is new. I removed it to make adjustments to the over-lap twice and adjustments to the butt-end - twice, I think - and since then it became so smooth and slippery. Any suggestions? I play with leather and no over-grip. BTW, for more info, grip is Gamma leather, brand new. Haven't played yet and it has already become very smooth and slippery.