Are there any really good cd cleaners out there?

Digital Systems and Solutions. The most highly recommended products. (The person who spoke of prints and marks ‘that he thought would never come off’ - is from another planet. CDs just don’t get that dirty. But I’ve just given you the company with products real afficiaonados “rave” about.) Enjoy. 

Never heard of em.

@syntax  My favorite one is Macallan.

just this minute saw your post. Being a canny Scot I have used Macallan and Cardhu before but made sure it went through my bladder first !!!!

I tried many products, all changed the sound. Some brighter some more bass, that is unreal when you think about it, how any added spray can change the sound. I use a very high-quality car wax now, just a dap, spread, let it cure and then I buff it well, play side only. Hands down the better sound and when compared to the mythical vinyl it more than holds its own, and sometimes better. I use Griots Poly Wax, you can even water it down with the same result..$300 of a CD cleaner nope, just $19.99, I could bottle this and call it an audiophile name and sell it for $100.00 a small bottle!. Kidding!, This I could say It Was Used By NASA which seems to be the new buzz word or medical field use. Got to love our hobby. Serious this product works well. I buy CD's weekly and will continue to do so and I grew up on Vinyl and I enjoy it. I do clean by disc 1st with a lens cleaner then a touch of the wax, buff and enjoy. For what its worth.