Periodic cleaning with a silver cloth is recommended.
From On Ice to Off Ice
Each game starts with 30 pucks in a freezer. The Off-Ice Official, who sits in the penalty box, hands a puck to the On-Ice Official every 3 to 5 minutes of play. Players find that frozen pucks "sit" better on the ice compared to a warm puck which has a tendency to go up on its edge.
As pucks come out of play, the Off-Ice Official dries them, wraps them with athletic tape and records the date and the opponent's name on the tape. To find out the game or season your puck was played in, enter your hologram code at Authentication