HP Scanjet 4070 Photosmart Guide De L'utilisateur page 17

Do not spray the glass cleaner directly on the glass. If too much glass
cleaner is applied, the cleaner could run to the edges and damage the
scanner.
When finished, reconnect the USB cable and power cable to the scanner.
Note
●
Clean the transparent materials adapter (TMA)
Clean the TMA with a dry, soft cloth. If necessary, lightly spray the cloth with
glass cleaner and wipe the TMA.
User's Manual
For instructions on how to clean the underside of the scanner glass,
visit www.hp.com/support.
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