I do the Missouri clean out.
Step 1. Wait for a windy day
Step 2. Determine wind direction
Step 3. Park car perpendicular to wind direction
Step 4. Open all doors for 3 minutes
Step 5. Close the doors.
I don't know why I call it the Missouri clean out because it seems to complicated for most Missourans, especially the ones that post here.
I never Warsh my car, although that is what I was taught to do when growing up.