Need to remove top of scanner microtek scan wizard 5 to clean underside of glass

It's very easy to remove the top cover of the Microteks.
First, remove the scanner's lid. Just tug up gently at the rear of the lid. On most models, the lid slides up on two posts about an inch for thick media, like books. Then just tug up gently again, and the posts come out of their holes. To put the lid back, just insert the two posts in the holes, couldn't be easier.
Removing the lid is also very handy for copying bulky items other than paper. If you might need some kind of background, you can lay a piece of paper or cloth over the object.
With the lid off, the E3/E6 have four screws exposed on top, one near each corner. The V300/V600 have two screws near the rear. The top cover has no wires or attachments at all, it is entirely separate (but some of the OEM clones appear to have the status LEDs on the top cover). Remove the screws on the top of the unit. It's easier to just leave them freely loose in the holes until you get the cover off. When the screws are free, just lift up on the top cover, and it comes off cleanly. The E3/E6 cover lifts straight up. The V300/V600 cover is moved forward slightly as it is lifted off, to disengage the tabs at the front.
The glass is secured to the cover.
The cover goes back on just as easy.

Regards....

Follow these steps to clean the scanner :
1

Open up your scanner's lid. It does not matter if the scanner is on or off for this basic, regular cleaning.

2

Wipe down the glass surface with a dry, lint-free microfiber cloth. This will remove any dust or other fine particles that have accumulated on the scanner. You should remove excess dust every day or two.

3

Scan a blank sheet of white paper into your computer and look for visible discoloration. A white sheet will provide a clean, blank slate to view the scanner's overall quality. If you notice any irregularities on the white sheet, you need to do more thorough, semi-regular cleaning.

Semi-Regular Cleaning

1

Turn off the scanner and open up the lid.

2

Spray a small amount of "mild glass cleaner" on a soft, clean cloth as recommended by Scanner-Magic.com.

3

Wipe the scanner's glass to thoroughly clean the area. You should perform this semi-regular cleaning at least every two weeks or sooner if a white sheet of paper indicates discoloration.

4

Keep the scanner's lid open for a few minutes until all excess glass cleaner has dried.