I started playing with the PC600 recently and absolutely loved it. At first, I really enjoyed playing with it (stock leather grip) without an overgrip, I felt the bevels well and this definitely helped my one handed backhand. However eventually I was forced to apply an overgrip due to blisters and slippage in matches. Since then, my game has never been as good as it was without the overgrip. I recently took off the overgrip and started playing lights out again until it starts slipping from sweat. This is a curious problem since grip has never been such a big issue for me. What can I do to keep playing well with this racket minus an overgrip?