by An analysis conducted by British microbiologist Jo Latimer found: on average, there are 241 bacterial colonies per square centimeter on the surface of keys. This is more than on smartphones or keyboards, but still less than on a toilet seat. Moreover, keys often contain dozens of types of fungi, which are invisible to the naked eye.
Despite this, most motorists don’t think about the hygiene of their keys. A survey of two thousand drivers showed: a third of them have never cleaned their keys, and almost half do it very rarely—once a month or even less often.
Experts advise not to neglect this small detail: wipe the keys with a damp wipe or a cloth moistened with soapy water. If dirt is lodged in hard-to-reach places, it can be removed with a toothpick lightly dipped in alcohol. But remember: avoid any household chemicals or full immersion in water—the electronics might not survive that.
