Doesn't work for me. Dirty grip drives me insane.
But I'm a little neurotic on the board, I hyper fixate on anything that could be considered a distraction.
Like, if there's a leaf on the ground 4' away from the ledge I'm skating, I have to stop and kick it out of the way.
If there's a big spot of mud on my grip, I fixate on it.
Can't help it, it's just what my brain does.
To be clear, I don't mind some dust and minor spots or wax or dirt.
But if my grip looked like this...

I'd throw that deck in a bonfire.