The cheap way, to try first, would be to wash the rig with Dawn Dishwashing Liquid. Dawn will remove wax. May have to do twice if heavy wax buildup.
Best way would be to go to an auto paint supply and buy a commerical type auto wax remover. It's used a lot in paint/body repair to remove wax prior to painting. Lot of other stuff you can use, mineral spirits, acetone. But the commerical stuff is made for your problem.