I purchased this 1 gallon Vevor Water Distiller 9 months ago, and have been using it daily to distill water for my humidifiers. I make 1 to 3 gallons of distilled water per day. My Vevor Water Distiller is a workhorse! When distilling water, I set a timer for 3hrs 57mins so I can turn it off before the reservoir runs completely dry. This helps to prevent mineral build up from burning to bottom of reservoir. Occasionally, I do miss turning it off in time and distiller will safely shut itself off when the reservoir runs dry. I also clean daily with white vinegar to remove the inevitable mineral build up by pouring about a 1/2 inch of vinegar on the bottom for water reservoir and briefly turning on for 1-2 min (without lid) to dissolve the mineral deposits on bottom. I then pour out the vinegar and wiping down the entire stainless steel interior with a soft cotton cloth, and it looks as good as new! Recently, it did start to leak a bit around the base of the lid. I noticed the silicon lid gasket had shrunk over time, thus the lid no longer had a tight seal. I was able to easily find and ordered a replacement gasket on Amazon. Problem solved!