Samsung SPP 2040 - Manual (Page 68)

6.2
Maintaining the printer
Cleaning the outside
1
Press the On/Off button to turn the printer off and disconnect
the power adapter.
2
Clean the outside of the printer
using a damp cloth.
If you want to use a cleanser, please contact a Samsung service center
for a recommended detergent. Do not use other cleansers and soaps as
they may cause damage to the print head.