I am not good about this. I should be. I have all mechanical machines that I have recently oiled and cleaned. I made a chenille and flannel quilt on my basic dinky mechanical Brother and months later after reading on this board about cleaning, I decided to try and take the bobbin case out (horizontal bobbin). That poor machine was clogged with fuzz and lint and who knows what else. It took me a long time to pick it all out and then suck it out with the vacuum. the blessed machine never missed a stitch for those months after. I also don't change needles very often. I'm going to try and be better but no promises!!