Bests & Worsts Reviews from Amazon

I bought this to make my baby's formula. I have had this product for about 5 months. I boil the water and place the water into a glass water pitcher and let cool to room temp. I then use the room temperature water to mix the formula. I noticed a couple of days ago that I have brown particles floating in the bottle. I open the machine and the whole bottom part of the pot and the filter is rusted at first I thought it was calcium deposits since I know these pots get that problem but and it's not calcium deposts. I called Panasonic, the specialist in the department named Anthony said this "Do you leave the water inside the machine?" I replied yes. He the said "You are not suppose to leave water inside the machine, on your manual it states VERY CLEARLY that once you are done with the machine you are to pour out the water". I replied, "If I need to pour out the water every 3 hours after I use it than wouldn't that defeat the purpose of having an electric water pot, I minus well boil my water on the stove". I asked " what should I do now, will this be under warranty" he replied, "no, because it's not a manufacturer's defect because you left wate inside the pot". I other words, chuck it and get a new one. I didn't argue with him since I did not have my manual on hand because I was at work. I return home and looked at the manual several times, I found in the manual that yes you are suppose to empty out the machine but only when NOT IN USE. I called them back the next day, spoke to someone else who elevated to a manager and they will replace the machine. .