I wasn't going to log in to this site again as people from here have stalked me around other places on the Internet like Facebook and Instagram but I'll do a cleaning thread as I am a cleaner.
Lets start here: The most harmful germs in your home aren't around your front door. They are in your kitchen and bathroom
Unless you properly sanitise your hoover after each clean, your hoover is always germy. Part of the reason that knowledgeable cleaners prefer to use a client's hoover is because you really have to decontaminate the machine by cleaning, a new bag and new filters after each client and that costs time and money.
It's less of a health risk if everyone uses their own hoovers in their own homes.
So you starting out knowing that the hoover is essentially spreading germs from one room the other. But most of the cleaning you do in a home isn't actually to disinfect the home. You're not trying to kill all bacteria amd viruses at every stage of the clean and you'll rarely achieve that anyway.
The ways you can minimise contamination is by having separate machines for separate areas. So perhaps keep one just for the living room.
The other thing is that after you vaccum, you disinfect the floors anyway. You can buy a fabric disinfectant to spray around on carpet but all hard floors will be cleaned anyway, right?
I vaccum bathrooms and I keep an attachment that I only use for that. That doesn't protect the hose and pipes from miniscule amounts of urine and faeces from the bathroom, but it does mean I don't have to clean the attachment before I use it in other places in the house. Sweeping your bathroom is typically not enough to consistently keep it hair and dust free.
You need to clean your vaccum often. All parts. Probably about once a month or 6 weeks max.