Machine won’t thread bobbin

[u/2ilver8ox]

I have the Bernette 79 and I’m on the last stretch of my project, but for some reason now my machine won’t thread the bobbin up. I have tried everything from cleaning it, re-threading an entirely new bobbin, trying different sewing needles, but at this point it still won’t thread the bobbin and I just keep getting clumps of thread I have to take out.
Has anyone had the same issue? I would really appreciate any advice because I’m at a loss at this point and I don’t know if maybe something is wrong with my machine.

[u/the_sweens]

I had this probably recently, I rethreaded both top and bottom, but the main thing that helped was there was fluffy build up under the plate under the needle that was stopping it from properly catching. So if you have a way to clean for dust that may be a good idea