First of all, not all germs in your kitchen are bad for you.
1. Not treating your kitchen with the same basic standards you hold for restaurants.
2. Prepping raw meat, especially poultry, without constantly washing and sanitizing any surface it touches.
3. Refrigerating or defrosting raw meat without putting it in an extra container to catch drips.
It's easy to just throw raw meats in plastic wrap and styrofoam trays from the store into the fridge but those can easily leak so that the gross raw juices drip out, says Reynolds. "Those drippings can get onto veggies and fruit below and if they contain pathogens like salmonella and E. coli, they'll cause terrible diarrheal illness," Tosh says.
It's even worse if the raw meat is frozen, because the excess water makes dripping more likely. The experts suggest popping your meat in another container like a glass dish or Tupperware to provide extra protection.