The answer to 'why is my steam cleaner discolored' is that discoloration in a steam cleaner is usually caused by mineral buildup, hard water, or the use of harsh cleaning chemicals. Over time, mineral deposits can accumulate inside the machine, causing the exterior to become discolored and stained.
Some common symptoms of a discolored steam cleaner include white or yellowish stains, a cloudy appearance, and a decrease in cleaning performance. To address this issue, you can try descaling the machine using a vinegar or citric acid solution, or consult the manufacturer's instructions for proper cleaning and maintenance. If the discoloration persists or the machine is not functioning properly, it's best to call a professional cleaning technician for further inspection and repair.