The down and dirty. the nasty. We'll get to scrub-a-dub-dubbin' on the muddy window tracks where the dirt gets trapped and never seen. Depending on the dirtiness, this is an additional service that we will spend a lot of time on, but is typically only necessary about once per year. for the really stubborn dirt stains, we will upgrade to a steam clean to ensure we get as much of the stubborn stuff off of the track as possible.