The 10 FILTHIEST items in your office

Again, transfer is the huge problem to the nervous habit of chewing pens or pencils. The pen has been touching germy hands all day - perhaps that were not your own. Chewing on a pen will therefore transfer bacteria and nasty germs to your mouth and, with 1 in 5 office workers admitting to chewing on their pens, you probably want to avoid borrowing one from your colleague!