Realized it was time to change the wiper blades while on a long weekend trip to TN. Picked up new wiper blades on Wednesday and when I went to change them, I found these down in the well where the base of the wiper is. One on each side, pen cap for scale: Thought it might just have been road debris when I found the first one on the driver side, but after finding an identical one on the passenger side, I doubt it would be just road debris anymore. Anyone know what they are? Wipers still seem to work fine, but haven't had them running above 35mph yet.