Touchscreen tablets and phones are popular in almost every respect but one - the smears that fingers leave on the screen.
Every owner of a gadget piloted via a touchscreen has spent time rubbing it with a tissue, a cloth or a sleeve gripped round the heel of the hand to banish those unsightly marks.
It's not that human fingers are filthy. Those smears come about thanks to a mix of physiology and good grooming habits, said Steve Block, an electronics industry scientist at Dow Corning, which makes coatings that get applied to touchable screens.
"There's a whole range of things that can contaminate those surfaces," he said. "There are natural oils on the fingers as well as the lotions people put their hands. Then there's cosmetics and the times when you hold your telephone up to your ear and it's sweaty."
Small wonder then that the sight of those smears is unsettling.
'via Blog this'
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