No Rubber Bands
Due to its pressure at the top and bottom of the deck, the rubber band poses a real risk of damaging the cards. Even though a rubber band keeps your deck together, it doesn't protect the cards
Use the tuck box or a deck sleeve.
As well as being used for marketing and branding, the tuck box also serves an important function of protecting playing cards. They prevent moisture, dust, and even direct sunlight from damaging the cards.
Keep them out of your pockets!
When you walk around or even sit on the deck, pockets tend to put pressure on the deck. Also, your pockets get warmer, you might start sweating, which can quickly damage the tuck box or even bend the whole deck.
Store the deck flat
Keep them in the right place
It is important to keep playing cards in a cool, dry place in order to prevent warping. If possible, store them in dry places such as drawers, closets, or cupboards in your bedroom or living room.
Avoid Direct Sunlight
Cards that are exposed to the sun can fade over time and even become brittle. UV (ultraviolet) rays from the sun can damage your playing cards
Keep your hands clean and dry
The dirt, grime, and oil on our hands are the biggest enemies of playing cards.
In no time at all, those crisp and clean white edges start to look yellowed or covered in mysterious flecks of grime
Practice on carpets or playmats
Dropped decks usually result in bent corners, and also susceptible to damage by dirt, oils, and other particles. The carpet/mats will protect your cards from such damage.
Spring your cards
By springing your playing cards, you will help keep them dry, while the springing action will help iron out any warping.
Fanning Powder
It is natural for playing cards to stick together over time. To prevent this, manufacturers coat cards, but the coating wears off over time due to usage, causing cards to stick together.
Using fanning and talcum powder will help prevent the cards from sticking to each other. Talcum powder makes the cards glide over each other more smoothly.