Venstar T7900 - Manual (Page 11)

3
Get To Know Your Thermostat
Care and Use of Your Thermostat
Pencils, pens and other sharp objects should never be used on your
thermostat; these may damage your touchscreen. Only use your
finger tip to press the touchscreen buttons.
Use a soft, damp cloth to clean the screen.
DO NOT USE ABRASIVE CLEANERS OR CLEANERS THAT CONTAIN
SOLVENTS. DO NOT SPRAY ANYTHING DIRECTLY ONTO THE
THERMOSTAT.