By

Michelle Castillo /

CBS News/ May 23, 2012, 12:19 PM

Where do germs flourish in your office? Study reveals dirtiest surfaces

4. Refrigerator door handles

LG
Disgusted by the old food that's sitting inside the work refrigerator? You might want to be more concerned with the handle. Twenty-six percent of refrigerator door handles were in dire need of cleaning, while 69 percent of them should probably be wiped with some bleach or germ-killing agent sooner rather than later.

"This study demonstrates that contamination is all over the workplace and has the potential to reach people where they eat and prepare food, as well as elsewhere," Brad Reynolds, North American platform leader of The Healthy Workplace Project, said in the press release. "No one can avoid it entirely, but by washing, wiping and sanitizing, employees can reduce their rates of cold, flu and stomach illness by up to 80 percent."