How do you clean under the glass of the Canoscan 4200f

SOURCE: Canoscan 4200f Problem with Vista 32 bit

I got mine working after experiencing the same problem.

I had mine hooked up to a USB hub, after I hooked it directly to the USB ports in the back of my computer, everything just worked fine.

Weird that it worked on the USB hub on XP and not vista though.

SOURCE: CanoScan 5000F foggy glass

No problem.
1st step. Remove the lid. It just pulls out at the hinge end by lifting straight up, horizontal if you like. Where the two lid posts insert in the scanner body you will find 2 screws, undo them, no need to remove at this point, too hard. Rememeber you left them in there though.
2nd step. Around the 4 buttons at the control end is a striped trim panel that is the full width of the scanner. Locate the join between this trim and the light grey underside of the scanner body and just left and right of the COPY & EMAIL buttons, Using your fingernails lift with some gentle force. This edge will pop up. Note, the trim panel has 3 location tabs that insert under the grey border edge around the glass. So pop the front edge first and pull towards yourself.
3rd step. Once this trim is removed you will note 4 little grey plugs equally spaced under this area. remove the plugs and you will find 4 screws. Unscrew them, no need to remove, remember point above.
4th step. Time for CAUTION. You will be able to lift the upper part of the scanner up in which the glass is mounted. ***There is a lead with little play connected to the 4 buttons PCB which is attached to the upper panel. To ensure you don't damage it accidently when cleaning the glass you can remove the 2 screws attaching it to the upper panel.
5th step. See if you can wipe it, with a VERY SOFT LINT FREE cloth, without putting you finger on it somewhere......................
6th step. reassembly is the same in reverse

SOURCE: Can a canoscan 4200F work with a macbook?

Have a look at this site.
They are discussing scanners and Macs here>

http://macosx.com/forums/mac-os-x-system-mac-software/275856-driver-my-canoscan-4200f.html

SOURCE: Cleaning Canoscan 9900F glass

To be clear, it is quite easy to remove the glass, but you shouldn't need to even if you can see the odd bit of dust. However, if you do want to (voiding warranty etc.) here's how:

1. unplug and remove lid
2. use philips screwdriver, remove screws in the two recesses of the main scanner body that the lid hinges slot into
3. gently pry the black plastic part away from the grey plastic body, starting near the glass until it tilts up and away. be careful of the clips at the back end of the scanner
4. the glass panel and grey surround can then be lifted and slid towards the back of the scanner and pulled free.

SOURCE: lost film guids for canoscan 9900f. looking for

lost film guids for canoscan 9900f. looking for 35mm strips and slides 120 and 4"x5" format film holders in the accessory kit for canoscan 9900f