Cleanzine: your weekly cleaning and hygiene industry newsletter 28th May 2026 Issue no. 1212
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While everyone else chases AI, real money is still made with a pressure washer…
While the business world obsesses over artificial intelligence, prompt engineering and digital growth, Aaron Muller has a different message: the real wealth is still being built by people who show up, get dirty, and solve physical problems that no algorithm can touch.
His new book: ‘Filthy Rich: Building Wealth in the Pressure Washing Boom’ is a ground-level blueprint for entrepreneurs who'd rather build something tangible than chase the next digital trend.
Aaron knows what tangible looks like. He started washing trucks as a high school kid to make some pocket money, bought half the company he worked for, and spent decades building from a single beaten-up box truck into multiple companies spanning pressure washing, mobile truck washing, restaurant extractor hood cleaning and industrial supply. He's done the cold mornings, the busted hoses, and the underbid jobs - and built his way from a single truck to owning some of the most recognised service brands in Northwest America.
"You can't automate a man with a pressure washer," he writes. "You can't outsource clean.
“While AI is reshaping white-collar work and automation is eliminating entire job categories, the pressure washing industry is quietly booming. Buildings still get dirty. Company fleets still need to look professional. Restaurants still have to pass inspections. None of that is going away, and none of it can be handled by a chatbot.”
The timing is deliberate. As AI anxiety drives more people to ask what kind of work is truly durable, Aaron’s answer is straightforward: recession-resistant, relationship-driven, hands-on service businesses.
Offering relentless practicality, the book features ready-to-use pricing guides, a startup checklist, telemarketing scripts, sample proposals and referral letter templates - the kind of tools that typically cost a small fortune in consulting fees. Industry veterans have taken notice: senior leaders from Hotsy Cleaning Systems, Suttner America and Patriot Power Washing have praised the book as one of the most honest and complete treatments of the business ever put to print.
Aaron covers every lane of the industry - residential and commercial washing, fleet and truck washing, extractor hood cleaning and heavy industrial degreasing - along with the equipment knowledge, chemical science, pricing strategy and operational systems that separate businesses which scale from ones that stall. He doesn't romanticise the work. He lays out exactly what it takes to win: recurring contracts, professional systems and the discipline to outwork the competition.
7th May 2026