Simple. Mix some Oxy-Clean with hot water in a spray bottle; spray on stains; wait a few minutes and use the upholstery nozzle from a carpet cleaner to suck out the solution along with the stain.
--2005 F350 Superduty Crewcab, 6.0, 4wd, short bed, 3.73 gears
--2016 Montana 3711FL, 40'
--SOLD 2014 Wildcat 327CK, 38'