One iPad had 600 units of Staphylococcus aureus, while a smartphone had 140. The dirtiest keyboard had 480, compared to less than 20 units per swab of an office toilet. -Advertisement- All those flourishing germs can thank today’s busy lifestyles, the company said, with people taking their gadgets into the bathroom with them to multitask, or rushing from bathroom breaks back to work without properly washing their hands.