Speck Electronics LiLo - Manual (Page 16)

Chapter 2 Installation & Setup 12
The module and chassis are a high quality painted surface and the panel
lettering is applied using a silkscreen printing technique.
To clean the top or rear panel, wipe the surface gently using a soft lint-free
cloth to avoid scratching the panel or markings. Paper towels are not
recommended. Commercially available window cleaner solutions may be
used; however, the solution should be applied to the cloth and not the panel to
avoid the seepage of liquid to the inside of the enclosure.
Do not use brushes or feather dusters to remove dust. This may cause dust to
fall into the openings around the pushbutton switches.
Cleaning