I have a kitchenaid that this happened too several months back. For me, I had to undo the mesh screen and the food chopper cover and totally clean and wash/degrease those areas out. While I was at it I replaced the food chopper disc thing. I also took the arms out and cleaned with super hot water. It is pretty easy so long as you have that star type screw driver, patience and time. There are videos too to help you. Maybe give this a try and see what happens? You can try to just clean and not replace the food chopper. I did mine because I happened to order with lots of other little parts at the time and it was about ten years old and I use my dishwasher every day. Good luck.