If it is a new magnetic stripe chip card, you can try to wipe the chip part with an eraser for a few minutes. The likelihood of continued use is high. If not, you have to go to the bank and do it again. Let’s talk about the most commonly used bank cards first. Bank cards are mainly divided into old pure magnetic stripe cards and new magnetic stripe plus chip cards. Generally, pure magnetic stripe cards cannot be recovered after degaussing. The method of rubbing clothes circulated on the Internet can only be a possibility. In most cases, you can only go to the bank and bring your ID card and other supporting documents to the bank. If you don’t need the original card number, you can apply for a new card at that time. If you still want the original card number, you need to wait a few days. Bus cards and all-in-one cards are also commonly used by people and are easy to degauss. If the bus card is demagnetized, it can only be magnetized in a place designated by the bus company. If the magnetization is successful, it can still be used. If not, you can only apply again, but you may not be able to get the previous money. Many merchants' membership cards are easily degaussed, but usually the card number is still the main part of the merchant's information system besides the magnetic stripe and chip. Therefore, even if the membership card is demagnetized, it can still be used by manually entering the card number or scanning the QR code, or by magnetizing it directly at the merchant. No matter what kind of card it is, degaussing can only be a remedy. The best thing to do is to take precautions. Try not to stack multiple cards or place them close to equipment that is prone to degaussing, such as induction cookers, microwave ovens, refrigerators, mobile phones, computers, etc. Expand data 1. What is degaussing: The strong magnetic field generated by high-frequency electromagnetic waves will magnetize the credit card, confusing the recorded information and causing the bank card to become invalid. The record information of bank cards and passbooks is stored on the magnetic strip on the back. The strong magnetic field generated by high-frequency electromagnetic waves during the operation of some equipment will magnetize the credit card, confuse the recorded information, and cause the bank card to become invalid. In addition, if the magnetic strips of two bank cards overlap, they are likely to be demagnetized at the same time. In addition, some medical examination equipment, such as the magnetic buckles of women's handbags, card readers on buses, nuclear magnetic resonance scanners, etc., can also cause bank cards to be magnetized. It is recommended to use ferrules, which can effectively prevent magnetic strip wear, but cannot prevent demagnetization. Although the ferrule is an insulator, it cannot block the strong magnetic field.