i wait until it rains go down my road where it floods. Hit that doin like 50. Let my truck stay running for approx 10 mins. Pick all the pine needles and leaves out. give it a quik rinse with the hose if needed. and it looks brand new. haha some decent engine degreeser and and a little handle scrub brush.and a few rags also windex works great on the plastic soak it down let it sit and wipe it off and if you want any thing shiny go over it with armor all. i do stuff this everyday