If people did this, I’d be out of business. But, I have to pass this along. A recent post on Clark Howard’s website, “This is why you probably shouldn’t wear shoes in your house” provides convincing reasons for taking your shoes off before going into your house.
A study done by the University of Arizona found an average of 421,000 different bacteria on shoes. Coliforms, a bacterial indicator of the level of sanitation of foods and water (and universally present in feces), were detected on the bottoms of 96% of shoes. 
In addition, E. coli was detected on 27% fn the shoes, along with seven other kinds of bacteria, including Klebsiella pneumoniae, which can cause urinary tract infection, and Serratia ficaria, which can cause respiratory infections.
90% of the bad stuff on your shoes gets on the floor. And what’s on the floor gets on your shoes.
Public restroom floors have been found to contain around two million bacteria per square inch, though the average toilet seat contains only about 50 per square inch.
So, it’s clearly better to take your shoes off before coming into your home. I have a few customers who are committed to the practice. One customer has a shoe rack by the door where the family and guests can remove their shoes and put on house slippers. Sounds great. Hygienic. But, their bulldog gets a pass. In and out, all day, the dog transfers dirt and who knows what else into the house. In fact, most of the homes with the shoes off policy have pets who go in and out without changing or even wiping their paws.
So, the best thing to do is vacuum often (weekly) and call me every six months.
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