All hoovers stink if they happen to get water in. At some point she must have inadvertently vacuumed a patch of liquid.
Throw some laundry powder / bio-tex onto the floor and hoover it up with your smelly hoover to make it smell nicer when it's hoovering.
Put the freshness back?
Pro tips.
@JurekB started
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All hoovers stink if they happen to get water in. At some point she must have inadvertently vacuumed a patch of liquid.