For cleaning carpets in your truck I use either Prestone carpet cleaner or Trutle Wax Carpet cleaner! They both will get out 5th wheel grease! Then follow with Scotch Guard! When you clean your carpet take a picture before and after to doucment that you cleaned and keep the receipts! tax deductable!
Honeywell makes a brand of car carpet cleaner called Prestone Interior Carpet Cleaner. It was specially formulated to clean brightly colored carpet, upholstery, vinyl and velour. Not only does it remove the most stubborn stains, it also helps to bring out the color of the material. The can comes with an upholstery brush to help you clean.