PSC PowerScanTM RF - Manual (Page 26)

User’s Guide 23
Maintenance
The scan window will require occasional cleaning to remove
smudges, dust and other debris. To ensure optimal performance,
clean the Scan Window using a soft cloth or lens tissue dampened
with isopropyl alcohol (or equivalent). See Figure 12. The scanner
body can also be cleaned using this method.
Figure 12. Cleaning the Scan Window