Using these Dragon Shield card sleeves is easy. Just gently slide your gaming cards into the sleeves one by one. When handling, try to hold the sleeves by the edges to avoid getting fingerprints on them. As for maintenance, keep them in a dry and cool place to prevent warping. If they get dirty, you can use a soft, dry cloth to wipe them. Don't use any harsh chemicals as it may damage the sleeves. And always store your sleeved cards carefully to keep them protected from any accidental bending or tearing.