As for the issue of cleaning bank cards and ID cards in the washing machine, we need to conduct a detailed analysis based on their materials and functions. ID cards are mainly made of paper materials, which are usually not damaged by washing and can be used normally after drying. However, the situation is different with bank cards.

For magnetic stripe cards, such as stored-value cards or debit cards, water ingress will not directly affect the magnetic stripe function, as long as they are dried. However, magnetic stripe cards are sensitive to strong magnetic fields. If they are close to devices such as mobile phones, TVs, or refrigerators, the magnetism may weaken or become demagnetized, and the card may not be able to be used normally. Therefore, to be on the safe side, it is recommended to avoid putting magnetic stripe cards in the washing machine.

For chip cards, such as credit cards or some debit cards, water entry may cause damage to the microcircuit of the internal chip, and may even cause the chip to burn out. Once this happens, the best solution is to stop using it immediately and go to the bank to replace the card with a new one to avoid data leakage and account security risks.

It is worth noting that with the development of technology, the insecurity of traditional magnetic stripe cards has become increasingly prominent, and many banks have begun to gradually switch to issuing chip cards. Chip cards use key encryption technology, which is more secure, and there have been no cases of being copied to cause fraud worldwide. Therefore, even if the magnetic stripe card is damaged in the washing machine, switching to a chip card is a longer-term safeguard.

In general, although ID cards are generally not affected by washing machines, magnetic stripe cards and chip cards are handled differently and need to be handled with caution based on the actual situation. For magnetic stripe cards, try to avoid washing them in a washing machine. For chip cards, if they encounter water, they should be replaced in time.