Lenovo ThinkPad R60 9457 Supplementary Manual page 15

Caring for your ThinkPad computer
If you notice any of the following conditions, gently clean the surface of the
reader with a dry, soft, lint-free cloth:
v The surface of the reader is dirty or stained.
v The surface of the reader is wet.
v The reader often fails to enroll or authenticate your fingerprint.
7
Chapter 2. Caring for your ThinkPad computer