Put sewing machine oil on area above #2 and below #3 area. Put paper below needle area to catch the run off oil, keep working the lever up and down. You will probably have to clean the lever lift also. That is the silver bar that lifts the foot. Get some pipe cleaner, the white fuzzy wrapped wire and use for cleaning in the tight spots, old t-shirt material is great for cleaning. I think you should let the people who worked on your machine know that they did not clean it enough.