When cleaning a touchscreen, it is important to realize they are sensitive to chemicals, much as is a pair of glasses with plastic lenses. 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. First, some warnings: Units are not sealed and can be damaged if liquids are sprayed or poured directly onto any surface of the device. Wring cleaning cloths of excess liquid before use on the device surfaces. Avoid Isopropyl alcohol at concentrations greater than 70% and non-diluted bleach or ammonia solutions. The use of incorrect solutions can result in visual impairment of the touchscreen, discoloration, and damage to functionality. Do not use any cleaning agents labeled as corrosive or abrasive to glass or plastic, including solvents (Like Formula [...]

The number of touches varies by the screen. For example, the number of contacts for some 7” touch panels is one million. Please contact technical support for data specific to your application.