If you're running an ordinary street tire (not an ET/Street) then just spin them enough to clean them off. You'll see some people drive completely around the waterbox to avoid dragging water up to the line in their treads; this is recommended. Your car won't react quick enough to redlight on the third amber. Stand at the line and watch a bunch of cars launch, and you'll get the idea of the rhythm & timing.
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Jeff Chambers
Trophy Stock #3
11.462 Seconds / 117.43 MPH
Chambers Racing Team