I was told by dealers to NEVER blow into your machine and never use the compressed air. Both the compressed air and your breath contain moisture.
I use a small artist brush.
Before I learned the correct way to clean my latest machine, I had used it for about three months, I only used an artist brush and when I went to my first class, I was happy to see very little lint when we were taught how to take it apart to clean it.
I had not even taken off the throat plate in all that time as I couldn't figure out how. It was clean there too as I had used the tiny artist brush up under the plate. I had just finished sewing with flannel and fleece before my class so I was really pleased that it was clean.
Moisture will ruin your machine.