For best results, you should use a soft, lens cleaner provided or a water-dampened cloth to remove the dried saliva from the lens. To wipe dry, use cotton, micro-fiber, or another soft towel or cloth. Do not use tissue, paper towels, or other abrasive materials, as this will scratch the lens. Do not submerge Ovatel under the water. This can cause trapped water to enter the viewing area. Before placing Ovatel back into the case, blow off any adherent fibers.