Stainless steel fittings would be replaced with a more hygienic composite material, ergonomic and vandal-resistant dryers would be installed, as would better lighting, hooks for bags and coats and easy-to-use locks.

BBC: Oxford council criticised for loo revamp

Another possible explanation from some experts for the increase in allergies: As westernized countries have become more hygienic, children don't have the same exposure to germs, which affects the development of the immune system.

WSJ: Food Allergy Advice for Parents: Start Peanuts, Eggs and More Sooner

He added that his firm would initially target the device at restaurants, hotels, airports and sports stadia, but added that he thought it ultimately "ought to be in everybody's house" as it was more hygienic than using and re-using hand towels.

BBC: Dyson launches all-in-one hand-drying Airblade water tap

Coats are no more and no less hygienic than anything else people wear.

BBC: Doctors