I recently moved to a place with well water and figuring out how to get the dishes clean was a whole thing. For awhile I was sure we were gonna need a new dishwasher. There were wads of paper in various places in the machine, I'm guessing the previous owners didn't bother taking labels off before washing them, but that's not the point here. What ultimately worked for the mineral film was citric acid. There are citric acid dishwashing products, but you don't need to spend a ton of money, it's a common food additive and you can buy it super cheap. I got this: https://www.amazon.com/gp/aw/d/B000OZFECU?psc=1&ref=ppx_pop_mob_b_asin_title I just throw a spoonful in with the detergent once in awhile and the glasses come out sparkling!