Are there any really good cd cleaners out there?

Absolutely! phillyb
Life is too short to not enjoy the physical formats. Soap/water is a good tip, as well as, a small drop of Windex to really clean those dusty/dirty used CDs. Been using this technique for many years without fail nor damage.

Happy Listening!

2nd Notefor those who shop Sam's Club (not sure about Costco?) the eyeglass moistened wipes are pretty good as well, a nice substitute for Windex.
Happy Listening!

Really, do folks have problems with grit, dirt and grease on CDs? I mean, come on, people! 

@phillyb 

Car wax usually has oils and other bonding agents, that's how they stick to the car surface and resist being washed off by rain, snow etc., as well as resisting UV...
best to use a ph balanced (non acidic) cleaner, like your dish washing soap, or if prefered a nice car shampoo! (The likes of Dodo juice, Wolfgang, Sonax can be googled)
and under no circumstances (as in: never ever) use car polish, they have abrasives which are very unfriendly to your 1 and 0 digits. -:)

tattooedtrackman
vinyl

Vinyl =plastic, car dash = plastic, guess what CD=plastic.
Armor-All is a plastic protectorant!

Cheers George