To remove car was from a brick driveway, squirt some liquid dish detergent (preferably one designed for cutting grease) onto the stain. Add water. Be sure to wet down the area surrounding the stain as well. Scrub the stain vigorously with a nylon scrub brush (not a wire brush which can erode or scratch the concrete), adding enough water to make a rich soapy lather. Rinse with clean water. It may take several attempts to completely remove all of the wax. Another way to remove the wax from the bricks is to spread a thick layer of cat litter over the grease to absorb the excess wax on the surface. Allow the litter to sit for a day or two, then sweep it away.