The next time you go to a McDonald's drive-thru, it might be smart to save your meal until you get home.

A study has found that remanences of food and drink in your car causes bacteria such as E.coli and staphylococcus. E.coli is a bacteria that lives in the intestines of people and animals, according to the Mayo Clinic.

More than half of car owners have dropped food onto the seats, foot wells or into nooks and crannies, a third have spilt a drink and a tenth used under the seats as a rubbish bin, the Daily Mail reported.

To reveal the lurking bacteria living in a car, the steering wheel and handbrakes were swabbed and tested.

If you like traveling with pets in your car, you may want to rethink that as well. Pet waste and germs, as you could imagine, also lead to extremely dangerous bacteria making itself at home in your car. Alarmingly, 60 percent of people still eat in their car after a pet had an "accident" inside of their vehicle, according to Express.

"It feels as if so many Britons don't think twice about chucking their half-drunk bottles of pop under the seat or leaving tissues which they've blown their snotty noses in the foot well of their vehicles," said Kim Woodburn, one-half of the cleaning tag team from "How Clean Is Your House."

"I was absolutely horrified to find some of the gunk that was hidden under some drivers' seats - and it was really worrying to find the presence of a pathogen that could lead to E.coli," Woodburn added.

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