I want to ask something, how should we keep uspcc cards properly ? I got a lot of my unsealed decks got clumps when I want to play it. Example: I bought a Madison Player, I bought 3, I open 1 to play with it and leave the 2 sealed. After I open it, I rarely play with it. Maybe twice per month. When the next month I want to play with it, It got clumps. I don't know why but it makes me confused.