This is my second Vevor distiller. The first unit I ordered directly from Vevor website. I loved it until it started leaking. I learned the hard way NOT to let it shut off on its own, the residue bakes on and creates tiny holes in the stainless bowl. Also clean every other time, instead of every 3-4 times. Second unit, I set the timer on my phone for 3 hrs 35 min, to catch it while there was still a little water remaining. I tend to use it in spurts, as I make colloidal silver and when my 5 gallon jug needs filling, I spend 2-3 days distilling water and brewing CS. This time I was on day 3 of distilling, I had one more gallon to go before I could put it away for a couple months again. I went to clean it between gallons and set the timer for 10 min, came back and the water wasn't even warm. Long story short, it's not heating anymore. I'm hoping my husband can replace the heating element, as I saved my old unit for parts - and since they have different issues, my fingers are crossed. I bought this unit in October, so it's too late to return. It's a great distiller and I really like it, but if I have to replace it every 25-30 gallons, it would behoove me to just buy my distilled water by the gallon.