DV10 optoma movie time is suddenly not recognizing DVD disks.

there are dvd cleaning disks that work ok. you can get them at best buy or radio shack. they'll just lightly brush the dust off of the lens on the optical pickup. if the unit is is humid conditions, you'll need to use a lint free microfiber lens cloth and gently brush the dirt off of the lens. if there is stuff stuck to it, you'll need denatured alcohol with a scratch free fiber swab to wash off the lens (don't use a lot of alcohol). blow it dry and test it out.