Scantron OpScan 4ES Operator's Manual page 169

Operator's Guide
5.
Using the dampened cloth, wipe along the
transport bed. Start at one end of the bed and
work to the other.
6.
Lightly dampen a lint-free cloth with soapy water.
7.
Locate the drive rollers. Wipe the drive rollers
using the lightly dampened cloth.
CAUTION:
Do not touch the read head with the
soapy cloth. Soap can damage the read head.
Chapter 8: Cleaning the Scanner
Procedure
149