Handling and storage
When handling a compact disc, do not touch the playing surface directly. Hold it by the edges or place a finger through the center hole and move it that way. The more you handle a CD, the more dirt and residue will be on it and the greater the chance of scratching it.
Save CDs either in a plastic cover, a storage bag or in a paper sleeve. If you use paper sleeves, store them in a stable container or somewhere they won’t bend. Storing more than one CD in a case or case can damage both discs, so use one sleeve or case for each disc.
Cleaning
Only clean a CD if it is dirty or scratched, as extra cleaning may cause more damage, and only clean the disc side of the disc. The best way to clean a disc is with compressed air from spray cans. This removes dust and dirt.
You can wipe a CD with a dry or damp cloth, but wipe it from the center hole to the edge. Never use a circular motion. Wet drying is more efficient, especially if there are particles on the CD that can scratch it, but remember to wipe off any moisture. Use distilled water with soap, if you like, but avoid harsh chemicals. The cloth must be soft, clean and free from other particles.
General guidelines
Store CDs in temperatures above 100 degrees Fahrenheit and out of direct sunlight. If the discs have been in cold temperatures, allow them to warm to room temperature before using. Do not drop stickers or tapes on the gig side, as this may affect how the player reads it.
Do not bend CDs. Twisting damages the disc and it does not matter. And if you try to break it, the disc may not break in half but may explode into a lot of sharp pieces and injure someone. Compact discs are used to carry all kinds of information, including music, movies, job presentations and other things. Due to their nature, they are easily damaged, but some guidelines will help you keep them in good condition.
Source:danspela.com