Bank card or Credit card plastic bag swiping trick

Have you ever had trouble swiping your Bank/Credit card at the checkout? Here is a card bag swiping trick for you.

The Problem:
Bank card or Credit card doesn’t work when swiped.

Solution:
Wrap the card in a thin, clear plastic bag and swipe it again.
Arrange a replacement of the card.

What can cause my Card to have bad reads?
The likely problems are dirty or scratched stripe, or erased stripe.

Prevention:
One way to prevent this is to use a thin layer of tape on all your cards from new.

Why does this trick work?
The card reader has a small induction coil that detects a succession of magnetic and non-magnetic zones in the card’s magnetic stripe. When the card is pulled through the reader, each magnetised zone makes a small electrical pulse as it passes the coil. The zones are arranged to encode the data needed to complete a transaction.