I know a guy that steam cleans restaurant exhaust systems for a living. Good money nasty job.
He said most managers/owners wait until it’s fixing to be a problem. For him, more grease=$$$.
“most managers/owners wait until it’s fixing to be a problem”
Yep, “out of sight, out of mind.” People just don’t do preventative maintenance until something breaks and it interferes with sales.
The Wolf Lodge paid the ultimate price for neglecting simple maintenance. The flue pipe had gotten disconnected in the attic and grease fumes were pouring into the attic and grease accumulating on the outside of the flue pipe.
How the fire marshall could determine that from that smolder ruin is beyond me.