This handy kit is great for cleaning DVD or CD media to remove grease, grime, fingerprints,grit or whatever else is on your disks to bring them back to great operating condition. The unit works by putting the disk in, applying some of the cleaning solution to the disk, then closing the lid and turning the handle to clean the disks with the soft brushes inside the case. No need for batteries. We have sold hundreds of these cleaners and our customers love them. The only problem they usually report is when they contact us asking if we can sell them anymore of the cleaning solution. We do not carry separate cleaning solution, but the answer is easy. Buy a large bottle of Isopropyl Alcohol and mix it in a half and half ratio to water and just pour some into the sprayer bottle.