Ultimaker 2+ Grinding Problem

[coema 0]

I have an Ultimaker 2+ that will not print correctly. When I came back to school over the summer and tried to print something, very little filament would come out of the print head and when it did, it would curl up on itself. I did an atomic method to make sure everything inside the nozzle was fine and when I did, the filament came out just fine upon pressing down and it came out the perfect shape (No dirt or anything. So then I figured it was something to do with the filament feeding. Sure enough, when I took out the filament, there was grinding at the part of the plastic that was in the feeder. I took off the feeder and cleaned it out and reassembled everything again. I did yet another atomic clean just to make sure nothing was stuck after another failed print and then finally reloaded the plastic. It's still doing the same thing.  I've also tried turning up the temperature of the nozzle just in case. I'm pretty sure something is causing the filament to not move correctly and therefore, it's grinding. But after cleaning out the feeder, it fed the filament correctly when reloading, so it's something that's happening during the print.

 

Hope all of that made sense.