Blowing or vacuuming air is a safe way to remove dust
clean the disk that's in your ps2
you clean it with water and a hint of alchohol
toothpaste
http://www.wikihow.com/Clean-a-PlayStation-2-Lens
try to use water and dab the outsides 2 clean the dust out on the outsides
Have a business clean it for a charge most do not just need cleaning but also polishing
Most are not dirty they are scratched and you can not clean off scratches they can sometimes be polished off professionally.
They say it will. but I have my doubt's.
get a cotton ball andalcohol then clean it with them.
With care not to scratch the disc, if the disc is already scratched the cleaning will not help
put soap on it and put water on it and clean it with water and then dry it and play it
You need to go to your local game seller and then they may have a disc cleaner.