Robot vacuums are convenient until they aren’t. One moment, your robot is dutifully making its way across the living room. The next, it’s stuck under the sofa, failing to find its charging dock, leaking water, or confidently driving into the same wall over and over again. At first glance, many of these problems look like serious defects. But often, the first step is not replacing the robot or even ordering a part. It’s figuring out the root cause.