Welcome to Over50sForum! The site for people over 50 to chat, make friends, discuss, share, and generally be part of something that's fun and friendly :)
Although I try to be careful with them - one or two have fingermarks on them. I have been told not to use kitchen roll etc., as this can scratch. Someone suggested 'baby wipes' but I haven't risked it
A clean white handkerchief is all I use. Breathe on the disc first then gently wipe it over. Underside of course not the label side. Don't use a cloth that may shed "fur".
The advice above is right too but you can use a Kleenex tissue (not toilet paper) It won't scratch either. Personally I just use supermarket own brand tissues
CDs that have been left out of their cases are prone to picking up dust, fingerprints, and assorted smudges, all of which can hinder their ability to play properly. Luckily, cleaning them is a cinch, and can be done with a handful of common household supplies. The most straightforward option is to wipe the underside of the disc lightly with a mild soap solution before rinsing it with clean water.
I can't vouch for the methods because my CD/DVDs only ever need a wipe, from the centre outwards, with a microfibre cloth.