Microbiologist makes SHOCKING revelation about how dirty public hand dryers really are

A microbiologist has revealed just how clean public hand dryers really are – and the results are shocking.

Tim Call, from Utah, has bad news for germaphobes drying their hands after a visit to a public toilet.

The 32-year-old, who has previously hit the headlines for sharing disturbing details about filthy kitchen sinks, likes to test commonly used products and spaces for bacteria.

In his latest experiment, Tim, who has more than 270,000 followers, tackles hand dryers in a TikTok clip that has so far amassed 40,000 views and likes.

Tim Call, from Utah, has bad news for germaphobes drying their hands after a visit to a public toilet 

Tim made the strange discovery by first placing a petri dish in a public bathroom for 10 minutes to see what the air contained – discovering five bacterial colonies.

He then conducted a second test by placing a petri dish underneath a hand dryer and activating the motion sensor for one single air blow.

Suddenly, he discovered eight bacterial colonies and after waving his hand to produce another air blow, there were 15.

Tim then got a new dish and waved his hand for 10 air blows – finding a whopping 20 bacterial colonies, as well as two large patches of fungus.

Horrified users have rushed to the comment section to share their thoughts on the step-by-step video.

One said: ‘I’m gonna stop leaving the house.’

Another wrote: ‘As long as you wash your hands afterwards you should be ok… oh wait…’

‘So I’m going in with a hazmat suit on,’ a third commented. 

He then conducted a second test by placing a petri dish underneath a hand dryer and activating the motion sensor for one single air blow

He discovered eight bacterial colonies and after waving his hand to produce another air blow, there were 15

He then conducted a second test by placing a petri dish underneath a hand dryer and activating the motion sensor for one single air blow – he discovered eight bacterial colonies and after waving his hand to produce another air blow, there were 15

Tim then got a new dish and waved his hand for 10 air blows - finding a whopping 20 bacterial colonies, as well as two large patches of fungus

Tim then got a new dish and waved his hand for 10 air blows - finding a whopping 20 bacterial colonies, as well as two large patches of fungus

Tim then got a new dish and waved his hand for 10 air blows – finding a whopping 20 bacterial colonies, as well as two large patches of fungus 

‘I don’t use those and don’t allow my kids to use them either,’ said one follower.

‘I always told my mom it was better wiping [my hands] on my pants,’ joked someone else.

‘This is why I always use hand sanitizer after washing my hands in a public bathroom,’ added another.

However, the results actually aren’t as bad as you might think.

‘I performed this test because there are many that believe that hand dryers are a terrible way to dry your hands after washing them,’ Tim said.

‘I’m not sure if I truly believe that.

‘My experiment showed a simple air test of the bathroom and a test of air being blown onto a Petri dish with varying amounts of air blown.

‘While the experiment shows that there is bacteria in the air and that a small amount will blow onto your hands, I don’t believe this is from the hand dryer.

Tim's first experiment was placing a petri dish in the public restroom for 10 minutes to see what the air contained

After 10 minutes, the petri dish contained five bacterial colonies

Tim made the strange discovery by first popping a petri dish in a public bathroom for 10 minutes to see what the air contained – discovering five bacterial colonies

In his latest experiment, Tim, who has more than 270,000 followers, tackles hand dryers in a TikTok clip that has so far amassed 40,000 views and likes

In his latest experiment, Tim, who has more than 270,000 followers, tackles hand dryers in a TikTok clip that has so far amassed 40,000 views and likes 

‘I believe the hand dryer is simply pulling the air from the room and that air is already contaminated.

‘In my opinion, you should be totally fine to use a hand dryer to dry your hands.’

Tim often shares videos to TikTok to educated others on just how dirty everyday items can be.

He added: ‘I make this content because I’ve always been curious about what was growing around me and I wanted to visually see it.

‘The cleanest thing that I tested that surprised me was gas pumps at gas stations.

‘I thought they would be filled with bacteria due to the amount of usage but was surprised to see there was very little growth – around five colonies grew.

‘I hypothesize this is due to the gas fumes being antimicrobial.’