why dont you go to your local self service car wash bay and just spray underneath with the wand/pressure washing hose?
I do it a couple times a year when the car is extremely filthy, usually after each snow storm when it warms up a bit, just to get all the salt film off the truck and clean the underside out.
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2018 Ram 2500 6.7L Cummins 68RFE
19k miles -Bright White/Black - Big Horn Sport - Crew Cab Short Bed
2013 X5 35D (CEO's) - Born on 5/17/2013 -
82k miles - Alpine White/Cinnamon Brown/Premium Pkg, Sport Activity/Premium Pkg and Sound/20" Style 214/Running Boards
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