Not trying to be a broken record....but lube the strings (hand lotion) and try again....if the control you want comes back, its because the strings are able to more back to neutral.
If it solves your problem, there are 2 choices. Restring every 2-3 hours or hand lotion. I took the hand lotion approach. It seriously seriously works. Plus, if you pick, as I did, my daughters "Night Time Sleepy Lavender Lotion" youll smell nice. Plus, youll have the smoothest, most well conditioned left hand in tennis. (I apply the lotion using my left hand as I am a righty.....)