Systems and methods for managing pestware are described. The auto-adjusting feeding mechanism is useable in high-security destruction, food processing, recycling, sorting, processing, and other applications. The reflective electrodes on the display area have holes exposing the transparent electrodes, while the reflective electrodes on the peripheral area have no hole. The strap portion is attached to the rear edge of each side of the elastic foot covering so that the strap can retain the user’s foot within the sandal. A controller is in communication with each drop charging electrode and supplies a plurality of synchronized controlled drop selection pulses to the drop charging electrodes. Each disk has a guiding block and a positioning block.