Mid print jam

[minakpori84]

Printer - geeetech a20 with lack enclosure Material - pla Fixes applied - Different filament guide, added an in line filament cleaner, upgraded to an all metal extruder, cold pull, changed Bowden. I've also reduced the max number of retractions, increased min travel between retractions. Adjust extruder tension
192.168.0.1 routerlogin 192.168.l.l

It jams mid print on longer prints. Not always the same height or time. Nozzle isn't clogged

What could I be missing? These aren't terribly long files ' less than 15hr print times and errors 3-6 hrs in.