Which foot is it? I think #160689 was the original in the accessory box, #161166 is the foot we stil can buy new. I guess there are one or two additional types. I have had the odd case where the needle bar an clamp needed to come off for a cleaning. Felted dust in the grooves has been known to off set needle enough to cause trouble. You may have to scrape all groves and corners with a tooth pick. It's worth checking things like that before you do anything drastic. If the foot is a low priced replacment and you suspect there might be something wrong, you could in theory grind down the cut outs for the needle just to give it more room.