This stuff is amazing! And it’s simply too much fun to use. At first I was like ’I’m just doing to do one liter on my most tea-stained stuff’, which turned into ‘make 4 liters and clean anything that has the slightest tea or coffee stain on it’. Haha- and I’ve alot of various cups and thermoses and teapots. I even soaked the OUTSIDE of a brushed stainless steel thermos, just to see how it would do (SHINY!) I’m half tempted to make a big bunch of this stuff to see if it’ll get my stainless steel kitchen sink super shiny, but that would be overkill… and a waste of cleaner. Although the tea stains never really bothered me before (except on the inguineTEA), it was just really cool and fun to watch. I think some of this stuff is possibly shinier than when I bought it.
Warning: it does make your hands slippery and slick for awhile after touching, so be careful with handling or you’ll drop it. After the first few I switched to using rubber gloves so I wouldn’t drop anymore things, I didn’t want to risk the ceramic. Also, it does work tons better when HOT.