If Western countries keep nukes as a deterrent for the last couple of decades, don't they get old and dusty and useless?

Even if the purpose of nukes is for them to sit in dusty silos and never be used, lol, like America, France, Russia, etc. India etc.
If the nukes are never to be used, don't they become expensive to maintain or keep dust free or even to potentially replace someday? The nukes? I've just always wondered that politically and socially.
If Western countries keep nukes as a deterrent for the last couple of decades, don't they get old and dusty and useless?
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