Before starting the machine, and every 4 hours of running time apply 1 drop of sewing machine oil to each of the 4 wicks on the top of the machine.

Brush out any lint from the bobbin assembly area. Spray out with WD40, then run the machine at low speed for 30 second to throw off excess.

Apply 1 drop of oil to the hook of the bobbin assembly. run machine at low power for 30 seconds.

Sew on a scrap fabric to clean up excess oil.

Check for lint accumulation periodically, especially if using cotton, low quality thread, or very linty material.