I've been having problems lately with the tension on my crosses (especially with 17 and 18 guages). Even strung at 58, you can take two consecutive crosses and slide them next to each other and they will stay there. It seems way lower than it should. I wonder if this has anything to do with my clamping. I used to clamp too tight and the strings would look thin where it was clamped. I started to clamp looser to get a better "sweetspot feel" and the clamp feels just right. Even with cleaned clamps this is a problem. Does anyone have a solution? I use a klippermate and their clamps.