Magnetization takes place when a watch comes in contact with magnetic fields, like those found in electronic devices such as TV or computer screens, airport security gates, x-ray machines, medical scanners, bank and department store sensors, mobile phones, speakers, or microwaves.

There are many tiny magnetic steel components working inside of the watch (such as the hairspring or the balance wheel), and when they come in contact with a magnetic field, these parts can stick together and affect the spring, making the watch speed up (or in some cases, slow them down).

If your watch is magnetized, it is best that you immediately demagnetize it to prevent further damage and resume with its normal function.