Earlier today I could print with gcode output by slic3r. I tried many things to adjust the settings to get better quality on the top layer. At some point slic3r started messing up the gcode.
Now when I try to print something, the bed goes up, then down again, then starts extruding in the empty air far above the print bed.
It's not the printer. I tried a file that I generated yesterday and it printed just fine.
I tried resetting everything back to the defaults in silc3r. Even that didn't work. Even with Print Settings, Filament Settings, and Printer Settings reverted back to their defaults, I still get the same behavior.
Does anyone know what's going on? I messed up something, but I have no idea what.