Use 70% isopropol alcohol and a Qtip and clean the lens in a back an forth motion, not circular. And don't soak the lens.
I got this tip from ARC. I do it about 2x year.
It sounds like its probably the CD and not the player. Try coping the CD and see if the copy works. Most of the time, it will.
Before you open the Ayre and clean it, I would call them first and see what they say. Ayre is a really good company, and I've seen many times where a manufacturer like this covers the product under warranty years after it expired.
Yes open the dam thing and clean it! you dont need to call anyone. These things get dusty on the inside, use a air duster to blow the hell out of the inside, then use a moist eyeglass cloth to physically wipe the lens clean. Then check the spindle the CD sits on and clean the top of that as well. Your CD player should operate flawlessly.