The pre-saturated Smart Card Cleaning Card has a unique bowtie design that allows the card to slide back and forth to safely and effectively remove all dirt, metal, magnetic oxides and other contaminates from all types of concealed or recessed contacts. Manufacturer recommended Smart Card Cleaning Cards help keep your Swipe or Smart Card Readers clean and efficient. Just swipe the Cleaning Cards through your magnetic stripe readers to help eliminate residue build up for positive scanning results. This pre-saturated, disposable head cleaning card is designed to safely and effectively remove all dirt, magnetic oxides and other contaminants from all types of concealed magnetic heads, photo and optic sensors on many different types of reader mechanisms.