Even on the left side? Our side is usually sooooo squeaky clean.....
I threw a Brunswick poured Purple Hammer last year for 8+ of the 9 games....
We had some lefties and they had the same issues. I saw urethane used effectively during Singles by a few, but not in Team and Doubles. But that was just a limited observation in my group and the sets I observed.
The UC3 had the best look of the urethane balls I saw being thrown, but I put mine right back in the bag and did much better with the Hy-Road, even in the last game of singles. I'm more speed dominate though.