I wonder if it is possible to get a "cold spot" on the heated bed? On a number of occasions I have been trying to print something and I get a corner lift at the left hand read quadrant of my heated bed. (Point 0,0,0 is at the right hand read corner of my bed, so I'm getting lifting near (-50, -50, 0).

I've tried slurry, hairspray, painter's tape or nothing at all, and I can't stop lifting in that area. The rest of the print sits down quite well. I've tried bed temperatures from 110 to 90 (printing ABS at 220).

Could the problem be caused by air coming off the extruder fan? Also, should the air pass over the extruder fan from the front of the printer to the rear, or vice versa?

I desperately need to resolve this as I have to print a minion for my daughter-in-law's birthday present.

Old Man Emu