Originally Posted by Steve - UK
DONT USE SOLVENTS it will ruin your paintwork and plastics - the best, quickest, cleanest, most thorough solution - which not damage anything - is to take the car to the garage and have it steam cleaned (not just high pressure cold water which wont touch it) The steam melts the wax away and will completly clean everything.
Before doing this, get some dielectric grease in all wiring harness connections to insulate them from the condensation that is about to build up with steam/watervapor/water about to build up. Not too many weatherpack connectors in there, if any. Life would suck to have to replace a 200$ sensor by spraying it down without the proper protection.
A great time to reset the adaptive strategy while you're at it