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Despite their resilience, magnets can experience a gradual loss of strength known as demagnetisation. One common cause is exposure to elevated temperatures, which can disrupt the alignment of magnetic domains within the material.

Physical shock or vibration may also affect the alignment, impacting the overall magnetism. Additionally, magnets can gradually lose their strength through a process called demagnetisation, where the magnetic domains revert to a more random orientation. This can occur through exposure to strong opposing magnetic fields or by repeated use in certain applications. In some materials, environmental factors such as humidity and corrosion can also contribute to a decline in magnet strength.

While permanent magnets generally retain their properties well, external influences and environmental conditions can lead to a gradual loss of magnetic strength.