He took the wooden dowel to the vacuum hose. He lined it up, taking a deep breath. This was delicate surgery. One wrong move and he’d puncture the hose, rendering the $900 machine a very expensive plastic paperweight.
About six inches down, wedged tight, was a silhouette. It wasn't the cat litter. It was something darker, denser. The "Ghost of Vacuums Past." clogged vacuum hose
In commercial scrubbers, a clogged vacuum can cause the circuit breaker to trip. He took the wooden dowel to the vacuum hose