Uploading older cds into itunes

Does anyone have trouble getting older cds to upload? My aluminum imac is very picky when reading cds but they play fine in the other players I have. Anybody recommend a cleaner i can use on the cd...or something.

I just use Windex and a paper towel. I rub from the inside out and not in a circle. This method works great for me. It's fixed CD's that would skip a lot and DVD's that would just stop playing.