Hello, I apologize for the “beginner” post but I searched widely across the internet and can’t seem to get to the bottom of this.   i recently purchased a TDU-N62 sewing machine. Apparently a clone (one of many) of the Singer 11-88.   My first project with the machine (complete beginner) is redoing the interior on my old ski boat.  While waiting for the Amazon man, I decided to clean some of the old grease and residual oils on the machine. Once putt back together (the only th