Waffletechnology EZ Check Scanner Kit (K2-KCIS) This product features patented Evanish solution that effectively breaks down dirt and debris in the card part and on thread head for effective cleaning; safe to use on electronic components. Dust, ink and debris can cloud the optical lens causing bad scans. This can make an automated system into a manual entry system increasing processing time. Clean your Check Scanner every 2000 scans or at least 3 to 4 times month. Dust, ink and debris can cloud the optical lens causing bad scans. Clean when experiencing poor print quality, illegible receipts, paper jams or print voids.