I CLEAN THIS EVERYTIME I USE IT,JUST SPRINKLE IN A LITTLE CITRIC ACID,SWISH AROUND WITH A SOFT CLOTH,AND READY FOR NEXT USE,EASIER WHEN WARM,,THE JUNK IS GRAY LIKE,,,ON THE BOTTOM.
Told it was out of stock, but came sooner than expected. Also easy to use and clean. Distills about 3 quarts in about 1 1/2 hours. I use it for my humidifiers, so taste was not an issue. If available, it is a good buy.