Foam in Air Vents?

When cleaning the interior of my car this weekend, I noticed thin foam blocking the driver and center air vents. The foam was relatively thin and black on one side. Any ideas what may have happened here and where this foam came from?

Car is a 2000 Base Boxster 2.7 with 101K miles.

... all Boxsters eventually.
The foam that forms the air deflection gates on the air controller deteriorates and begins to disintegrate.
It will spew foam for a few months.
You can help to clear it by closing all vents but one, running the fan at full blast and using a strong vacuum cleaner to suck it out of the vent.
Happy Boxstering,
Pedro

Pedro Bonilla
1998 Boxster 986 - 311,000+ miles: [www.PedrosGarage.com]
PCA National Club Racing Scrutineer - PCA National HPDE Instructor - PCA Technical Committee (Boxster/Cayman)

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