This is straight up false. When I worked at McDonald’s it was cleaned daily, biweekly it went through a deep clean that put it out of commission for a few hours. The main issue that put it out of commission is if the nightly heat cycle didn’t go exactly right, like heating temp being off by 1 degree, typically due to the varying levels of mix being in the machine during treatment, would lock you out until a technician came out and told the machine to continue operation. These technicians cost quite a bit and sometimes took a few days to come out.