Wax is meant to protect from water, so scrubbing wax with soapy water will not remove it. Poke around your home for an all-purpose cleaner instead. Dab a bit of cleaner onto the affected area and leave it to eat away at the wax. After a few hours, come back and gently scrub the cleaner off with a soft brush or an old toothbrush. There are also detailing brushes available to purchase for just this sort of work. After the cleaner has removed all the wax and you have scrubbed off the cleaner, rinse the area with some water and let it dry. You will be able to see if the cleaner has done its job. If there is still wax, you may need to repeat the cleaning process a few more times.