An aside. Watching a fountain the other day, i marveled at how water never wears out. Never. It may change and separate into the atoms, but water just does not get old.
Atoms just survive a long time.
Metal is just a bunch of atoms. Thenare not wearing out.
maybe they get corroded, chemically interact, but basically they do not 'wear out'
So screw the idea fuses wear out.
Now light bulbs wear out. But we all know of some light bulbs which last for 20 years.. Rare, but around.
So most light bulbs are designed to burn out sooner. Planned death.
Maybe the OP's fuses have a planned failer? so they have to be replaced?
I would thus say stay away from that brand. As they actually may be making them to fail in a short time.