Sodium aluminum [sic] phosphate

This is one of my moka pots. I have three altogether: a little (slightly less than) one person size, one ginormous size, and this Goldilocks fellow. It's been through the dishwasher once before and came out looking absolutely splendid; all shiny and well loved.

Yesterday, though, it was looking a bit tired and in need of sprucing up so I decided to give it another whizz through the washer but, to my surprise, when I extracted it for the purpose of making some coffee, this morning, it looked all matt and lifeless.

A quick Google revealed that "Your dish-washing detergent contains alkaline phosphates. At high pH, the 'passive' aluminum surface dissolves as Na2Al(OH)4 (sodium aluminate). This reveals 'active' metal underneath, which reacts with the phosphates in the water to form aluminum phosphate. Sodium aluminate reacts with sodium phosphate to form sodium aluminum phosphate. Sodium aluminum phosphates precipitate out of the water, and deposit onto the sites along the surface of the aluminum cookware, leaving these powdery spots." (Thanks Robert Kinner of Toledo, Ohio for that.)

There were also some useful instructions about how to restore the pot to its former glory but I had neither the time nor the required items, so I just had to use the big Moka instead, which worked out pretty well, actually, as I used the surplus espresso to make a coffee to take in the car on the drive to work.