Cleaning the touchsceen
Use a clean, dry, microfiber cloth—the kind you would use to clean glass surfaces to wipe the touchscreen.
Dampen the cloth cloth with an Isopropyl alcohol and water solution of 50:50, and then wipe the screen. Always use the dampened cloth to apply the solution; never apply the solution directly, which could seep inside the screen or stain the phone. In addition, do not use chemicals to clean the touchscreen.
Disabling VVX Touchscreen
It is highly recommended to disable the VVX 500/600 series touchscreen prior to cleaning to avoid activating phone functions while the screen is being wiped.
Select Settings > Basic > Screen Clean (option 8)
Wipe the screen with a clean, dry, microfiber cloth.
Press any key on the phone console to enable the touchscreen again