I'd say the blue or dark gray would be a fungus issue. Have you dumped biobor or startron in there at all? Can't hurt to give it a try and it'll kill whatever is in there anyways.

__________________
TC
Current stable:
- 2004 Mazda RALLYWANKEL
- 2007 Saturn sky redline
- 2004 Explorer...under surgery.

Past: 135i, GTI, 300E, 300SD, 300SD, Stealth