Creality ender 3 s1 pro print not sticking to bed July 8, 2019 16 32 64 128 Ender 3 v2 prints not sticking to bed Ender 3 not printing correctly Ender 3 s1 pro clogged Ender 3 s1 pro extruder not working Creality ender 3 s1 pro software