Here is the scam I picked up in the ShamWow commercial.
He pours the cola on the piece of carpet, then shows the bottom. There is cola everywhere, moving in front of the carpet piece, etc.
The camera cuts away for a half second and he says "we're going to do this in real time, can you keep up camera guy?"
The carpet piece is switched, then he pulls 50% of the cola with the ShamWow. Then he pats the ShamWow and gets all of it.
Then he pulls it up to see the bottom of the carpet, It is a brand new piece and there is no drop of cola.
What a scammer.