The Neo is a four-foot-tall, 1,000-pound robot floor scrubber. The high-tech machine can cruise large commercial buildings on its own, with no human supervision required. Since its introduction in 2016, Neo’s sales have roughly doubled each year, said Faizan Sheikh, the chief executive and a co-founder of Avidbots, the Canadian start-up that created the robot. This year, however, demand has shot up 100 percent just since the pandemic-induced shutdown in March. Suddenly, the need for thorough, reliable and frequent cleaning is front and center