Finger Painting

I really was struggling for a blip this evening and having fired up the laptop to upload something I resorted to taking a taking a picture of my desktop.
I was somewhat surprised by the result, which was almost unrecognisable.
It's a touchscreen laptop and due to the flash about all that you can see are my lovely swipemarks. I really didn't realise it was quite that messy, you can't tell in normal lighting - honest.
I am now off to wash my hands.