I'm not anti Kenmore really just the stuck up ones I seem to run across. You can use gun cleaner if you don't get it on any of the plastic. I would not spray any solvent, what will dissolve the gummy oil could dissolve your plastic parts. You can take the cover off and you can pull the motor out but you will have to get it back in later so take adequate precaution. Some times you can take the panel by the hand wheel off, too. Then you can paint on something to dissolve that gum. Also pay attention to the feed dog and nose areas, too.