Ducksterman,

[sarcasm] Your a little late. The chemical is some new-fangled thing called Teflon. It's marketed by a company called DuPont. I've heard they are even planning to use it in. . . get this. . . non-stick cookware. [/sarcasm]

Seriously though, a lot of hydrophobic chemicals have the tendency to repel dirt (well, when the dirt is in water anyhow). I didn't know Airflow was specifically using Teflon until I looked it up, however. Regardless, the line has stayed pretty damn clean, especially considering it has a bunch of groves in it.