contico are crap, they are the wierdest cloths i've ever used, they're like paper, as thin as paper too. i ordered 1 from stream to try along with other stuff, when i looked at it i thought they were avin a laugh, total rubbish.
by coincidence i used a brand new unger one today, left millions of fibres all over the window, had to throw it back in the van & get an old cleantech one out. i'm assuming they need to be washed first. will wash them & try again.
tony