Originally Posted by
Mrs. SewNSew
Good eye! Yes that part pull back *partially when you pull out or push in the knob and that allows it to travel up or down the stack and find the appropriate groove to drop into. I would think you could try and carefully maneuver it back into the slot, continue cleaning, and move forward. (I could be wrong. I am not a professional.) That's what I would try at this point though.
Thank you Christy! I'm going to continue cleaning and try to do just that. The knobs give no movement, but perhaps I will be able to pull up on the stack with my fingers so this little fella can fall back into its slot. I won't force it though and if it's not resolved soon without force, I will take it to a professional

Thanks again!