Cleaning cd lens ?


Is it wise to open the unit and clean the lens? I have a Marantz DV9500 that will not play all cds. I suspect lens is dirty. Besides a q tip what should I use for liquid ?
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I have a rotel 855 that skips,do you think the compressed air might work or is player to old?
Myself, CD with physical brushes attached, and compressed air.

Not certain of isopropanol or any other solvent for that matter (I'd be concerned with the mount of the lens rather than hurting the lens itself, but a 99% USP grade isopropanol is also available at most drug stores; you just may have to ask for it.
Besides the cd with brushes or compressed air, try alcohol free liquid eye glass lens cleaner.
You're welcome, but 70% is not pure and I wouldn't trust their definition of "water" (yes I'm a cynic from way back :). Use what you want, but I have only ever used pure isopropyl (which you generally have to ask for) or pure acetone, which you can find on the shelf.

Good luck and hope you get it working right!
Danmyers...The distilation process used to make alcohol yields about 30 percent water. It boils off and condenses along with the alcohol. So the water is distilled, and you don't need to worry about it.