My guess is that you are printing the top to slow. When you print very slow, the filament heats up further upwards and gets soft there. That’s when you risk getting it stuck. Infill at 100% seems unnecessary to me.
Hi! At the end of the print the model is getting smaller which activates simplifies3d slow down routine. You can find these senttings under the cooling tab. Basically simplify slows down the printspeed too much which causes the filament to clo, due to heat creeping upwards into the filament beyond the hot/cold break of the hotend. Try printing with adjusted cooldown settings, for pla minimal layertime could be 5-6 seconds. You can also play with the max amount of slowdown simplify is allowed to change. Because your print speeds to start with is already low, the extra slowdown is just too much. 40mm/s at 0.1mm is really quite slow. On the rep2 we usually print at 70/80mm/s at 0.2mm layerheight at 195C to 205C. That’s almost twice as fast at dubble the layerheight, so our output volume of material is much higher which helps prevent clogging hotends on slow speeds. Hope these tips help find better settings!
