When cleaning a touchscreen, it is important to realize they are sensitive to chemicals, much as is a pair of glasses with plastic lenses (usually polycarbonate with a glare reduction coating). In fact, the cleaning kit supplied with a pair of such glasses is just the ticket for safely cleaning your touchscreen; it typically includes a micro-fiber cloth and a gentle cleaning solution and can usually be had for $10 or so.
Cleaning Instructions: Use a soft, lint-free cloth. We especially recommend the 3M Microfiber Lens Cleaning Cloth is for cleaning touch panels without needing a liquid cleaner. The material may be used dry or lightly dampened with a mild cleaner or Ethanol. Be sure the cloth is only slightly damp, not wet. Never apply cleaner directly to touchscreen surface; if you spill the cleaner onto the touchscreen, soak it up immediately with an absorbent cloth. The cleaner must be neither acid nor alkali (neutral pH). When using a cleanser, avoid contact with the edges of the film or glass, and with the flex tail. Wipe the surface gently; if there is a directional surface texture, wipe in the same direction as the texture. Never use acidic or alkaline cleaners, or organic chemicals such as paint thinner, acetone, toluene, xylene, propyl or isopropyl alcohol, or kerosene. Suitable cleaning products are commercially available pre-packaged for use; one example of such a product is Klear Screen™ or commercially available off-the-shelf retail brands such as Glass Plus® Glass and Surface Cleaner made by Reckitt-Benckiser. Use of incorrect cleaners can result in visual impairment of touchscreen and damage functionality.
Note: Most products contain 1-3% Isopropyl Alcohol by volume, which is within acceptable limits for Resistive Touch Panel cleaning use.
Caution: Many products contain Ammonia, Phosphates or Ethylene Glycol, which are NOT ACCEPTABLE; check product content label carefully.
Note: Resistive touch screens (plastic film) have an air vent to equalize pressure on some part of one of the edges. Getting any liquid on the vent can damage the display module, so the panel needs to have a gasket and bezel to prevent this. An acceptable solution would be to put a cleanable screen protector over the entire screen before gasket/bezel. See Screen Protector for more information.