I have well water. It goes through two filters before it comes out of the tap. It then goes through a Brita filter. Even so, I'm getting this white mineral stuff in my Utilitea that flakes off and is mostly strained when I pour the water from the Utilitea into my teapot.
What can I do besides buy bottled water? (not that bottled water is any better) It doesn't seem to affect the taste of the tea, but I still am not fond of looking at it.
Pour some white vinegar into your utilitea and swish it around (you can cut it with some water if you want, but the straight stuff won't hurt the machine). Watch the white cruddies dissolve before your very eyes! (Or speed it along with a little elbow grease.)
I wrote an article on filtering water awhile back ago on my blog. It might help you understand what's in the water that's making the scale.
Yeah, water week was one of the weird synergistic moments in tea history. I'd just begun drafting my post when I took a break, wandered to your site and saw...a water post. Le sigh. So I shifted focus a bit to water filtration, and the universal balance was restored.