How do I clean an ULTRA touch screen professionally?

You can clean an ULTRA touchscreen with any commercially available cleaning agent.

It is not recommended to use an abrasive powder or sandpaper.
It is not recommended to use an abrasive powder or sandpaper.
You can clean an ULTRA touchscreen with any commercially available cleaning agent. A ceramic hob scraper has proven to be very helpful in removing stickers or chewing gum.
It is not recommended to use scouring powder. You should also not use sandpaper, because sandpaper is often made from quartz sand. Quartz has a Mohs hardness of 7 and scratches the surface of the ULTRA touchscreen.