Above all, due to the extreme sensitivity of the CCD sensor, you must protect it from static electricity. You 'll have to put an astatic bracelet on your wrist, or putting your hand to something linked to the mass before each handling of the 
CCD sensor in a simpler way.

There is a small stuck paper on the QuickCam box, and it covers a small hole. .

Pull out the stuck paper and insert a unfolded paper clip in the small hole while lightly pushing on the fixing clip. This handling is the most difficult, as one risks to break the clip if pushing too strong..

One can now open the camera with a small screwdriver to remove the two others clips.

Once the is opened, one can get out the printed circuit, with always avoiding touching the electronic circuits.

Remove the two optical part's screws, and pull out the optical block with great care

Now, one can see the CCD sensor. Avoid touching the sensors' surface or blowing on it to remove small particles of dust.

Put  back the printed circuit in its housing. Don't forget to reinsert the black frame and  metallic support for camera tripod.

Close the top while pressing clips. The first step is over.