I use a paintbrush with bristles that are on the stiffer side. The soft ones are too soft. I also have a little vacuum cleaner attachment set I bought at Harbor Freight a long time ago, I don't think they carry it anymore but I've seen it on Amazon.
Here are instructions on how to clean your machine, plus a great picture showing what happens if you use canned air.
https://weallsew.com/how-to-remove-l...ewing-machine/