From my experience, generally CDs and DVDs don’t pick up much dust unless left out in the open and with this, a light brushing of a dry tissue is enough to clear off dust.
When it comes to fingerprints or anything else such as dried up droplets of coffee, etc. I would recommend using cleaning wipes that are designed for cleaning discs. Generally screen cleaning wipes that are designed for TFT displays and scanners will also work fine. I’m fairly sure lens cleaning pray for glasses will also work well, however I would recommend testing on a bad or unwanted disc, such as an AOL disc, just to make sure that no haze is left after cleaning.
Stay away from other types of cleaning products such as window cleaner as I destroyed the plastic lens of a flashlight using household Windows glass cleaning spray, which shows how strong the chemicals in some of these products are.
If you get scratches on recordable discs, I would strongly recommend copying the contents onto another disc if you can still fully read the disc, particularly when it comes to rewritable media as it generally works out much cheaper using another disc than it does trying to repair the scratches. However, if you find that the scratches are bad to the point where the disc is unreadable or if you have scratches on an original, just be careful with what product you choose to ‘eliminate’ the scratches. Cheap scratch-repair kits typically use an abrasive liquid to â€˜buffâ€™ out the scratch and I have only used such a product once and ended up ruining the disc. In fact, from what I have heard, these are no more effective than using toothpaste (also slightly abrasive) to buff out the scratch. The better products actually fill in the scratches. However, as these often cost two to three times the price of the disc you may be trying to repair , it would be better to buy a replacement disc unless you have got a lot of scratched discs to repair.
Finally, if you are looking to clean out the laser lens in your player or PC drive, I would recommend trying a wet-dry based cleaning disc without any fluid first. If this does not help, then test the cleaning fluid in the kit to see if it leaves any residue â€“ put a drop on the shiny side of an unwanted disc, let it dry up and if it leaves no residue behind, you can try this to clean the lens. Otherwise if the fluid leaves a residue when it dries, get hold of a cleaning fluid with as high alcohol concentration as you can get and before you use it, do another residue test.