Royal Sovereign's RBC-CLN currency counter cleaning cards are the fast and easy way to clean your currency counter. The patented Waffle technology design removes dirt, dust and oil from your bill counter that can cause misfeeds or jams. What makes Waffle technology so great for cleaning your counter? Most bill counters have lenses that are rounded and sensors that are recessed. Getting to these items cannot be achieved through the use of flat cleaning cards. Waffle technology cards are flexible and have raised platforms on their top and bottom surfaces which spring up and down reach every nook and cranny in your counter.