(The worst offenders were petrol pump handles, handles on public postboxes, escalator rails and ATM buttons. Closely following on the filthiest list were parking meters and kiosks, pedestrian crossing buttons and buttons on vending machines in shopping centres. Dr. Kelly Arehart said, "It comes down to the fact that nobody cleans the things that you're going to touch on a daily basis." Of course Kimberly-Clark Professional are a unit of personal hygiene giant Kimberly-Clark Corp, and they sell hygienic wipes. Surely there is no coincidence though.)