Borosilicate glass bed with surface texture (basically an Ender 3V2 bed, but on a Voxelab printer). 210 deg. nozzle, 60 degree bed. Hatchbox PLA. This spool printed really well just a couple of days ago. Now, nothing.
I have been printing a brim to try to increase adhesion. I cleaned the bed with isopropyl alcohol (like I always do) and after that failed, I cleaned it under the sink with some hot water and dish detergent. Re-leveled the bed. Printing my 5th attempt right now and putting down the first layer, but it already looks a little suspect.
Usually it gets to about the 3rd or 4th layer before it just starts dragging the print around with the nozzle.
So, here's the one thing that I think might be the problem. weeks back, I heard some squealing, squeaking sounds coming from the printer. I added a dab of food safe, teflon impregnated silicone grease to the rods. It was only weeks later when I heard the squeak as it happened that I realized it wasn't the guide rods, it was the stupid spool rubbing the plastic spool holder.
Fast forward to today, I noticed a shiny spot on the build plat. I think it was a bit of this grease that somehow transferred to the build plate. Now I'm concerned I have literally created a teflon non-stick build plate.
As I'm typing this I am up to layer 2 and it looks like a bit of the brim might be curling up away from the plate already.
I don't have any pure acetone on hand so I can't try that. I might see if I have any brake cleaner, carb cleaner or gun scrubber to try.
Any ideas?