I am the Director of Marketing here at Drill Doctor, we try and monitor discussions about our products, and I became aware of this one. I don't mean to put my nose into your discussion, but think I might be able to help. We have shot a video that discusses negative relief that might help you can view it here:
However, it sounds like the video might not cover the issue you are having. We are here to help! you can contact us through our website, or call tech support at 1-800-418-1439 and we will diagnose the problem. We are just a small family owned business here in Oregon and stand behind our products so please don't hesitate to reach out so we can help.
Thanks for letting me barge in.