I want to know why this is a problem. Why does it matter if someone is using a "visibly filthy keyboard" or only washes their face mask once a month. Does it make them ill? Does it make them smell? Does it affect their life or the lives of others? If not then why does it matter?
Because a visibly filthy keyboard suggests they don’t care about hygiene at all and probably don’t wash hands after the loo, therefore spreading bacteria. Most offices have some degree of hot desking so you wipe down your keyboard, mouse, desk surface when you log off. If it’s visibly dirty the person was either eating over it or smearing it with dirt from their hands?
I’ve seen people sit at their desk scratching their flakey skin infection down their sock or blowing their nose and touching their keyboard. I hate it when they ask me to help and I have to touch their mouse that’s probably covered in fungal spores or sneeze droplets. No point cleaning? Great way to spread everything from the common cold virus to covid to norovirus to fungal infections!
Only washes their face mask monthly? Why are they bothering to wear it? It offers no protection to anyone if it’s grubby and germ covered on both sides. If anything a damp dirty mask is a breeding ground for bacteria and viruses?
These things matter because we’re coming out of a pandemic that spreads rapidly through poor hygiene. Hand washing and mask changing has become compulsory not optional. And surprise surprise there are less outbreaks of flu, D&V bugs, fungal and bacterial skin infections etc since more people now use sanitizer, bin tissues, wash hands, avoid touching their faces and wear masks for close contact and don’t go out when unwell!
So yes, poor hygiene habits CAN make people ill, make their families and colleagues ill too. Does it matter if they smell? In a shared office or having close contact (eg leaning over a patient or serving food) it does matter, it’s deeply unpleasant to put up with BO in a confined space. If someone couldn’t be bothered to shower regularly I’d worry they couldn’t be bothered to wash their hands after going to the loo each time or think hand sanitizer stops us building immunity!