We pick up bum-bum germs all day long, on our hands, our shoes, our cell phones, our purses, and so forth. But there are three big things you can do to remedy this nasty situation.
First: Take off your shoes when coming home. Do you ever think about the things you are tracking in? Dirt, bird poop, squirrel poop, dog poop, spit, gum, bum-bum germs galore. Would you lick the bottom of your shoes? I'm guessing that 99% of you would not, although I am excluding the Deep South from my facts and figures. So why would you walk on your floors and carpets or curl up on your bed or couch with your shoes on, and expect your kids to crawl, lie, or play on those now-yucky surfaces? Taking your shoes off at the door will prevent SO much muck from coming in, and hey, you won't have to clean your carpets as much. If you have a baby who is scooting or crawling, this is especially important. Because, groce.
Second: Wash your hands upon arriving home. After, naturally, taking off your shoes. Think of everything you touch while you are out: Shopping carts, gas pumps, doorknobs, escalator rails, your steering wheel, your cell phone, money, people's hands, restaurant salt & pepper shakers, and so forth. Maybe you even went to the doctor today and touched things that other sick people touched. Everything you can think of is crawling with germs. Colds, flu, fecal matter. Yummo. So as soon as you are home, lather up. Just get rid of all those things you've touched in the big scary world. Start fresh. This makes me feel like my home is a safe haven, free of the majority of "outside germs." If you're bringing your kids home from school, it's especially important to wash their hands, because school is a hotbed of disgustery.
Third: Never, ever put your purse or bag or wallet on the counter. Handbags are teeming with germs. They are dirtier than a toilet. Your purse handle touches everything you touch. You often place it on the floor of restaurants as you eat, or movie theaters as you get your World War Z on; it accompanies you to the public toilet and you handle it after doing your biznass; etc. The strap of your purse, the bottom of your purse, and the inside of your purse is filth-laden. Clean it on the regular, and never, EVER plop it on the kitchen counter along with your keys when you get home.