holland village bk also close down. ):
i worked there for a bit during my school vacation an ice age
ago 
btw... each day, when we do the closing, we'd take a scraper
(you know the type painters scrape paint off walls) and scrape
thick layers of congealed grease from the chimney vents of the
burner... the burners they threw the "beef" patties into..
we'd collect enough to fill about one and a half of those
catering steamer trays and the gunk will be put in a bucket to be
collected by the waste disposal companies
then, we'd used caustic soda (sodium hydroxide) to wash out the
residual grease and oil in the burners and chimney outlet... then
set the burners to "high" to burn out the residual chemicals...
yes.. that's what you guys are eating