AKIPRESS.COM - Nichole Ward shared a stomach-churning picture of a Petri dish on Facebook, which she claims to have held under a Dyson Airblade for three minutes and left to "incubate" for 48 hours.
It's unclear what sort of scientific background Nichole, from California, has - if any - to make her assessment.
Dyson said it was "surprised" by the results, noting that it was "unclear on the methodology employed".
A company spokesperson said: "We’re very surprised to see these results, and unclear on the methodology employed.
“All Dyson AirbladeTM hand dryers have HEPA filters that capture particles as small as bacteria from the washroom air before it leaves the machine.
"Dyson AirbladeTM hand dryers are proven hygienic by university research and are trusted by hospitals, food manufacturers and businesses worldwide.”
Nevertheless, Nichole's post has been shared more than 530,000 times since being made last week — and it’s even caused countless people to start using paper towels again, The SUN reported.