How to fix CD?

Is it the cd or the player that is acting up ?

Are you able to play the cd's in another player, car, etc...without issues ?

If the CD experiences laser rot or has scratches, you can try to rip it into a computer and than burn a new copy from it. Ripping software does a much better job reading damaged CD due to its superior error correction capability. I had rescued a few in the past doing just that. It is worth a try.

I usually take them over to the sink and with just a dab of dishwashing liquid and using my hands and a little water give them a good cleaning just to remove some of the oils and grit over the yrs of handling. Then wipe gently with a very clean cotton cloth.