Totally in agreement with "The Food Scientist"
I used to work in a tea factory & there is considerable amount of dust..... to clean each machine the machine operators were "blowing down" their machines with compressed air which had the effect of merely shifting dust from one location to another & even more irritating was the fact that they were unable to see why this wasn't an efficient way to clean.
Thankfully successive versions of BRC raised the use of compressed air as a health & safety issue which needed PPE (esp safety specs) to use & we finally brought in vacuum systems to remove the dust, followed by wipe down & sanitation, along with visual standards of what constitutes "clean".