TBH just bleach would do
Actually no, it doesn't.
Well it'll get the surface first stance, can't say it'll never come back
Acid/vinegar soaking into the surface a bit makes a less hospitable substrate for mould. Bleach might clean it initially but doesn't work so well long term. And is liable to make your sofa go a funny colour.
@bluehuw started
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Actually no, it doesn't.