clean

So I was driving on the sand beach in OBX and i got a lot of sand on my car And in the engine, whats the best way to clean that out. We ran it through a under carriage wash and washed it by hand(only the frame) so is the a way that gets thew sand out? Thanks

I know I should read the manual but what the heck Ok I got a piece of chocolate rubbed into the drivers seat. So I rubbed it with a damp cloth, with water nothing else... Now I have a water stain and a faint chocolate stain. What shoudl I use to clean this seat properly?