Doorknobs
If you think those people using their elbows or paper towels to open doors are being paranoid, think again.
According to a 2012 study published in the Continental Journal of Medical Research, among 180 door handles and knobs swabbed by researchers, nearly 87 percent had bacterial contamination, with 30 percent testing positive for staphylococcus aureus, 16 percent testing positive for E. coli, and 26 percent harboring Klebsiella pneumoniae, bacteria associated with the development of pneumonia and bronchitis.
And while that may sound scary, a simple wipe with an antibacterial cleanser can take care of the bulk of that bacteria for you.
