I keep my little brush nex to my spare bobbin box and clean everytime I change or refill a bobbin. I oil around once a week; I also clean after machne quilting - batting makes more lint than regular fabric. And I change needles after quilting with poly batting which blunts like nothing else!
Don't I sound good? I have to add that this is only since I got my new (to me) machine. The old one had the same needle in for ten years and used to get it's bobbin race blown into once in a blue moon if it was lucky! :oops: :lol: