Many drain and industrial cleaners will first chuckle when asked to identify their most difficult jobs. After all, when you’ve spent years unclogging sewer or grease trap lines, or waterblasting the residue from an industrial heat exchanger or sludge tank, they’re all hard jobs, right? Nonetheless, after some thought, there are a few projects that always max out the pain meter. Here, three cleaners recall the toughest jobs they ever did.“The toughest job we do is cleaning glass particles out of a holding pit at a company that makes fire-retardant material,” says Danny DeFauw, an operator for Bob Frame Inc.,
