used according to label, BTW the label was easy to remove. Actually rinsed a little more than recommended, but not a lot. Coffee tasted nasty afterwards. Rinsed again, still nasty. Used white vinegar to take out the solution. Still nasty and now coffee tasted like vinegar also. Had to rinse at least 5-6 tanks of water (after using 2 tanks to rinse the vinegar) to finally get the bad taste out of the pot. Product is really expensive and a lot more work than the vinegar. not worth the price or the extra, extra, extra rinsing.