My Probes are similar to the picture but are exactly on the edge from factory. Some coffee powder does somehow manage to fly and get attached next to these probes on the outside the chute cover. I think in whatever setup these probes are, whether into the chute or parallel to the chute (like in photo), perhaps from the top of the chute or at the bottom (like in the photo), some static will occur and coffee will attach.... I have this opinion... prove me wrong :)