People can spend hours per week cleaning and tidying up their homes. However, according to a new study, no matter how much disinfectant people use, their homes will still be covered in bacteria. The bacteria, at least, mostly belong to the people who live in the house.

"We have so little information about where the microbes come from that shape our microbiome, whether it's for health or disease," said microbiologist Jack Gilbert of the Argonne National Laboratory and University of Chicago according to Philly. "It's the indoor environment. The best place to look at that was the home."