HP 2300c - Manual (Page 5)

NOTE: Dust will immediately begin accumulating in your scanner now that the top cover
is off. Static discharge from your fingers, hand, or tools will damage the circuit boards
inside your scanner. Do not touch anything inside the scanner base.
Step #5 Cleaning the Glass
Spray the underside of the glass sparingly
with glass cleaner. Do not allow the cleaner
to pool or run over the edges of the glass as
shown marked in red. If cleaner runs over
the edge of the glass it could stain the
calibration strip (white strip under glass) and
render your scanner useless. If you do get
cleaner in the calibration strip area, you then
must send it in to HP for repair.