Nastulate
Nas-chew-lit (noun) nasty, grimy, sometimes slimy dirt that covers an object. (adjective) describing something that is covered in nastulate
The bathtub in the commercial for the cleaner was covered in nastulate.
The nastulate house was vacant for some time and needed a deep cleaning before it would be livable.
The nastulate house was vacant for some time and needed a deep cleaning before it would be livable.