How to clean a sewing machine

How often should you clean your machine depends on how often and how long you use it, and what sort of projects you sew. Generally get into the habit of having a quick check of the bobbin area every time you change your bobbin to see how it’s going.
If you live in a very damp, rainy, humid or salty area, you may need to take care of it a little more often and be prepared to add a little more oil.