I have wondered that too. I wouldn't say most,,,,but many customers compain about the cost a normal cleaning. The run it till the heath department inspects em and gigs em for their dirty IM, then a service call is issued.
I would love to see a real world time lapse video of a IM in the places where we see bad things happens. BTW,,,, how long is the lumiice good for?
But just selling them on the price prob would be the hard part, lol.
I guess its human nature to run it till it breaks.
They say to change the bulb once a year.
They also say it will work best on a new machine........ Sounds like you can not start off with a slimmer and expect anything.