I've told this story before about when I used the spray concealers, but it still mortifies me even all these years later.
I was at a party and in the kitchen standing around talking to a group of people.
At some stage I must have leaned my head back and rested it on the glossy white wall cabinets.
When I stood upright and started to walk away, some one said "Euurgh! Whats that dirty great brown splodge on the door?"

That stuff got everywhere and ironically it was harder to get out of pillow cases etc that it was your scalp.
My bathroom had a constant layer of 'brown dust' over every surface.