While I was sewing my next Modern Block, my bobbin finally ran out (yay, Aurifil!) so I decided it was as good a time as any to vacuum out my machine and change my needle.
I wish I had taken a picture of the dust in there! UGH! Even though I do this fairly regularly and haven't been sewing anything particularly fuzzy, I did skip the last bobbin refill because the vacuum cleaner was downstairs
Also, I'm sure the work going on in my house doesn't help.
P.S. This is what I use to clean out my machine. I have been told that the compressed air is not a good thing (nor is just blowing on it!) because that can actually force the dust further into the machine.