This is certainly not all that I or you should do to clean your truck, but it helps get the large easy to see pieces of dirt off your chassis and a-arms... the whole bottom of your truck. Here's how it happened...

I was out for a drive after football practice with my MERV and I accidentally slid into a large puddle that was 1+ inches deep, which is pretty deep for a MERV. After driving out of the puddle, I did some donuts and drifting in patches of dirt. By the end, my truck was covered in gravel & mud. So... I drove my MERV through some TALL DRY grass for the last minute of the battery life, which acted like a brush and it totally dried off the chassis while cleaning it. I just thought it was a super easy way to clean off those pieces of dirt that are always stuck to the chassis, etc. When I got back in I took apart my truck to prevent rusting and to just do a few simple maintenance things.

I don't know how well this would work with other higher trucks, but for my MERV it was great.

Wow... I just wrote a lot about something that is really basic.