Agreed. It's not impossible. One has to be careful to install the shims/spacers back in place. That's the only tricky part.
Removing molds/fungus from glass is easy. I used a 50/50 mixture of amonia and nitrogen hydrogen peroxide (see correction) and dip the elements into the solution and rub then a bit and the molds/fungus can normally be removed. (Molds/fungus will eat up the coatings of the glass if they have been there for too long)
Cleaning plastic screens with the above solution is not the right way. A blower will remove the dusts but any solutions like alcohol or the above mentioned mixture will leave behind streaks and rubbing will make thing worse. So the only way is to replace them. Cost of screen alone is inexpensive but the additional costs of postage, labor and time are really something.
So, unless you can handle it, send the camera to Canon repair facility for service. BTW, before sending the camera to Canon, after removing the focusing screen, give a few blows to the SD screen and see what's the difference.
Also, I suspect the fungus is inside the view finder, check out the last pic in the post attached
http://www.canonrumors.com/forum/index.php?topic=30851.0
@RobertTheFat wrote:
@lly3988 wrote:
If the fungus is not on the focusing screen or the mirrow glass, it could be inside the view finder or the superimposed display screen which is behind the focusing screen. It is not difficult to remove but not easy to put it back in place. ...
Not easy, but certainly not impossible. I've done it on two different DSLRs, back in the "Katzeye" days. It does require some manual dexterity, and having small fingers (as I do) probably helps.
But I think if I had it to do today, I'd follow your advice and send the camera back to Canon. They should at least know how to kill off the fungus without doing any further damage to the screen.
