I have reserved myself to using only higher RG but seems to leave an lot of corner pins.
If you're playing the right part of the lane, and
1. If they're weak 7 (lefty) or 10 (rightly), the ball is rolling too early. Either make the cover smoother or add a little polish.
2. If they're ringing leaves, in general, the ball is going too far before getting into a roll.
A minor adjustment of the surface will handle that. Make it slightly rougher than it is.