When I had my old Kenmore (and I wish I still did) I used to clean and oil every moving part frequently. But then, the gears etc. were metal. Nowadays with these new machines most are plastic. I have a computerized Janome and I was told never to oil it. took it to the dealer last week, it was 1 1/2 yrs old and they cleaned it and put the oil in the parts that needed it. Runs like a charm once again. so check with your dealer. Marge