One can almost never successfully swipe my credit card - one has to punch in the 16 digit number, with expiration date - of my credit card. I will ask for a new credit card.

I travel by air frequently (at least a couple times a month). Sometimes, I carry my wallet in my pants/trousers pockers - through the metal detector. Sometimes, I put my wallet in my attache, and it goes through the xray machine, for hand-carried baggage/ luggage.

What can I do, to minimize the demagnitization of the magnetic strip on the back of my new credit card, so that swiping the credit card number will be successful?