Hey guys I am going nuts trying to level an Ender 3. The build plate that came with it warped so I got a piece of glass and I put one of the Ender sticker surfaces on it because I like it.

I have a print that goes around to each corner to level then moves to the middle. All 4 corners are the exact same height , but when it gets to the center the extruder is Touching the plate.

I have checked the cross bar the extruder is connected to its level. The printer is on a level surface. The glass is perfectly flat and there are no air bubbles under the sticker. I do t know what to look at next. Can anyone offer a suggestion?

Also is there a thin digital pressure plate that can be used for this? Would be a lot easier to have something that’s the exact height and see when it touches to know it’s in the proper place.