When the cardholder washes the bank card with water, first check whether the bank card is obviously bent or damaged. If not, dry the water, let it dry for a while, and then go to the bank's self-service ATM machine to test whether the chip can be recognized and whether the magnetic stripe is demagnetized. If not, it can be used normally.

Generally, bank cards will not be degaussed, but they will be easily degaussed when they are placed with magnets, glasses cases, equipment, magnetic rods and other magnetic objects for a long time. There are also magnetic instruments in the washing machine, but the washed bank cards are rarely affected, so generally speaking, bank cards without bending can still be used after drying.