does bialetti moka express coffee maker get stains after use, does it change the taste of coffee?”
You can get the white stains in the water reservoir by putting some white vinegar in the water reservoir and running it through a couple of times. Hard stains might take some white vinegar directly on a sponge or scrubber to get out. The burnt taste might be because you have some residual coffee grinds in the system. Running just white vinegar through the system a few times (with no coffee) should flush them out. Be sure to run distilled water after you run white vinegar, in order to get rid of the white vinegar taste. Much more likely is that it is your Starbucks coffee beans that taste burnt. They are famous for overburning their beans. Try another brand of beans. Or even better yet, see if any of your local coffee houses grind their own beans and will send them to you. I personally roast my own beans. CoffeeGeek.com or SweetMarias.com can tell you everything you need to know about
