Chosen Solution

I turned my coffee maker over while cleaning it. Several small pieces fell out. I figured out 2 of them (part of the sneak-a-cup feature). I am left with one small round piece, with a center that bobs up & down. (See photo #1) It doesn’t appear to be part of the sneak-a-cup. Perhaps it is part of the reservoir. (See photo#2) It looks like it fits, but it doesn’t stay put. I’ve searched online for hours; called & written the company (no help because this piece is not referenced in the manual & coffee maker is too old); and visited thrift stores seeking a similar model to see how this piece fits. Does anyone have an answer?

It’s so hard to tell. It looks kind of like a nozzle in a way. If you want to fix it so badly because you like this model,I think amazon still has it for $35 or something like that.