First of all welcome. Secondly, maybe I can make a better suggestion for the floor mats.
1. Vacuum them clean
2. Spray with Blue Coral Upholstery Foam(Wal-Mart sells it)
3. Spray with a hose enough to saturate the fibers
4. Gently scrub with a stiff bristle scrub brush
5. Let soak, hose off...