Update 2.15.2020-I went through a trouble shooting process and because I wasn't able to exchange it, the vendor honored the sale by shipping me a replacement. Dilemma solved. I've tested the unit and it appears to work flawlessly.Update 2.09.2020-I have contacted the vendor via email and they have responded promptly. They have suggested to watch an attached video in the email and soak the unit using the enclosed cleaner for 12 hours. I've willingly complied and awaiting the unit to finish cleaning. Because they've cordially responded in a timely manner, I've elevated my rating from 1 star to 3 stars as they have offered a discount or replacement. I will update the review at the resolution of my issue.I ordered this to create my own distilled water for my CPAP & cleaner water consumption. I've used this unit 4 times & cleaned it according to the instructions & using the accompanied cleaner. The interior metal which should be stainless steel is beginning to pit and rust on the bottom! This doesn't make me happy in the least as this indicates this is an inferior product! Stainless steel shouldn't rust! The whole purpose of using a distiller is to make cleaner water!? It can't be returned according to Amazon policy b/c it contains unreturnable items? Ok, how about a replacement or a refund? Perhaps this is an outlier and mistakenly passed QC? At any rate, i can not recommend this product. As they say, buy cheap, but twice. If I'm able to resolve this issue with the vendor, I'll adjust my review reflecting a positive experience & response.