Matt:
Ideas for your company logo:" When it absolutely, positively has to be clean." or " Can't remember when your kitchen exhaust system was cleaned, call us." We take on the hopeless cases."It looks like your customers wait until just before the flames start melting the grease. I hope you are charging them thru the butt. I assume they all don't look that bad!
There is no way we would be able to send a man into those ducts because of size and weight of the men and ducts. Ever consider scapers on the end of poles accessed thru cleanouts or is that just not daring enough.
Also, it appears you send the scraper guy in after you wash the system. What about those caustic burns? Ouch, ouch, ouch!
I admire your chutzpah and love the pictures, keep up the great work.
Ernie G