Are there any really good cd cleaners out there?

No isopropanol in the house? Plain vodka should work ok!

Best products I’ve used are by Digital Systems and Solutions. Clean Disk-cleaner, and Ultrabit Platinum (just a small drop) for refined disc reading and enhanced sound. Noticeable improvents through my Spectral/MIT system. Dish soap has been an old standby for years and seems safe. This products give a noticible improvement over soap; I’ve checked. 

Another vote for L'Art du Son -- more than just a cleaner, a once over with this is a must even for brand new CDs

@jim204 

rub in small circular motions

I have mostly read CDs should be wiped from the center out and not with the direction they spin.  I haven't read doing it with small circular motions. Does it really matter which direction you wipe them as long as you don't overdo it?  Anyone else with specific recommendations? Just trying to learn something.