I just got back from a road trip to Canada and New England a few days ago and my truck is COVERED in salt. I want to get it off thoroughly ASAP. Washing the body seems like a no brainier but any tips for the undercarriage and frame? Should i spray the hose through the little holes in the frame to get everything out from inside the frame? will straight hose pressure water be enough or should i apply soap to the under carriage somehow?