I had a spot on my bed that was having adhesion issues at one point. I just cleaned it with some dish soap, warm water, and a soft sponge and it started working perfectly again. I'm pretty sure it was oil from my skin touching the plate that was causing the problem.
Yeah, I just retrammed and it is dead on for each corner, but what a warp through the middle. I ordered a glass bed to see if I could get a difference result. Cause why not throw more money at it. :(
