(1) cleaning of cloth feeding teeth: remove the screws between the needle plate and the cloth feeding teeth, remove cloth and dust, and add a small amount of sewing oil.
(2) the cleaning of the shuttle bed: the spindle bed is the core of the sewing machine and the most prone to the failure. Therefore, it is necessary to clean the dirt and add a small amount of the machine oil.
(3) cleaning of other parts: the surface of the sewing machine and all parts in the panel should be cleaned regularly and kept clean.