Clean when experiencing card rejection, reader error or repeated swipes. Cleaning must be done at least once per week. Clean more frequently after periods of high usage and outdoor usage. Failure to clean frequently can cause system failure, device downtime and customer frustration. Sensitive chip readers should be cleaned to avert misreads, reduce manual data entry and fraud potential. This product features patented Evanish solution that effectively breaks down dirt and debris in the card parth and on theread head for effective cleaning; safe to use on electronic components. Use on Digital Check/SmartSource Check Scanners.