I found it pretty easy to clean the carpet. Get a garden pump sprayer, make a solution of oxy clean, bleach and water. Cover helm area with plastic and tape off to protect electronics. Soak carpet with with water, just soak it -not a mist or just a little wet, spray solution liberally on carpet, go have beer for 30 min, rinse with with hose. Repeat if necessary. Leave fan running and ventilate to dry over a few days once complete.
You clean the entire carpet getting rid of years of dirt, dust, salt. No scrubbing, really not much effort and it came out great.