The answer to 'why is my steam cleaner buildup' is that steam cleaners can accumulate mineral deposits and residue over time, which can clog the machine and reduce its effectiveness. This is often caused by using hard water or not properly maintaining the cleaner.
Some common symptoms of steam cleaner buildup include reduced steam output, water leaks, and a decrease in cleaning performance. To resolve this issue, you'll need to thoroughly clean and descale the machine. This can often be done with a DIY descaling solution, but for stubborn buildup, it's best to call in a professional cleaning technician.