Davinci Jr. 1.0 filament feeder issues

Hi,

So I picked up a Junior 1.0 at the local Barnes and
Noble oh a few months ago and never had any sort of issues until I
bought some new filament.

So essentially the first sign of a issue was when I would try printing
something and it would lay down
the very thinest first layer and then continue printing basically nothing.
Air printing is what it would be called I believe.

So I figured perhaps there was a jam. So I unloaded the new filament and tried to
clean it the way the videos on the XYZ site tell you to but that didn't
change the results.

Next up I tested my files and made sure I wasn't transposing numbers
somewhere in my modeling and that what was printing was what I had told it to print.
I checked and double checked and I determined it had nothing to do with my model files.
So I felt as if I had perhaps missed something So I went back to the extruder.

I popped the whole thing apart, looked through its guts and confirmed that there was
no jam in there then cleaned it up, reassembled the thing,
and put it back into the machine.

Now what I hadn't mentioned or really taken notice of was that when I was unloading
the filament only the few inches that went from the spool into the filament feeder
motor were still attached.

Somewhere in the feeder motor the filament was getting crimped off and that was the cause
of this whole issue. So the next step was to pop off the side panel, remove and disassemble
the feeder motor. Unsurprisingly there was a huge buildup of filament powder and
obviously a blockage of filament. So I cleaned all of the components out, reassembled
the thing, and then put the machine back together.

My next step was a test file to show myself that it was feeding and printing just fine.
The test print went fine and I thought I had succeeded in my task so I chose to start
building the file where everything had all gone awry.

The file in question has a long run time so I set it to start building, turned off
the lights and went off to do something else thinking that my print would be finished
in a few hours.

I came back to it air printing, again.

So I unloaded the filament, disassembled the filament feeder, and while I didn't find
any jam I did find a build up of powder from the filament again.

As you can see in the two attached photos this is the filament powder buildup I was talking about.

This all being said can anyone suggest a fix?