i have the EXACT same problem, but my inspiron 8100 was always like that since the first day i received it. if someone can post a link or describe (in detail if possible) how to open this thing up and tighten down whatever is inside, that would be great
I'm looking at the front of the hinges on my 8100 and I see a small round "plug" on each hinge. I bet you can pop those plugs off and tighten an adjusting screw underneath them.
if no one tried it by this weekend, ill pop off those lil plugs and poke around, then report back.
as far as cleaning the monitor, just wipe it down with something. i dont really care what i use on it - usually just a damp cloth though.
I just stuck my little fingernail in the cutout on that "tab" and it hinged itself to the side. Underneath us sure 'nuff a small phillips head screw. 'Bet that tightens it!!