I'll try some DipIt or Oxyclean in it next time. I didn't think to realize it was Aluminum so yeah, DW detergent isn't best. I'll straighten her out and get the Caw-fee flowing. I do have to say it is the QUIETEST cawfee pot I've ever seen. It hardly makes any noise while perking. Just a slight gurgling sound. Like I said, I don't think it's automatic. I let it run more than 8 minutes and it never shut off, so either it is manual or the shutoff doesn't work. No biggee, just start it, set the timer for a minute/cup and unplug it when time's up, just like with a Pyrex perc.