keeping mud off of decking on car,

[fruit loop]

what is the best stuff to do to keep the mud off the underside of the car, I now mud off product is good but very hard to clean off and wash ea week, any ideas

[race21j]

what is the best stuff to do to keep the mud off the underside of the car, I now mud off product is good but very hard to clean off and wash ea week, any ideas Might get more answers if it was in the TECH area.