She comes back several minutes later looking frazzled and slightly terrified, apparently the bartista refused to make me another drink because I sent back the previous two chemical concoctions, and insisted the poor server comes to tell me this news herself since the barista refused to that as well. I break down laughing at this, since to me it seems like the coffee shop has started to conspire against me to make sure I'm completely unable to consume anything. I go up to the bar and a manager I know is there, so I beg him to make me my latte even though by now the place is closed, and he agrees. While this is going on, you can hear the server chewing out the barista for being such a bitch.
At this point another customer comes up and asks if my drinks tasted like soap, and I realize that yes in fact, they kind of did. He informs me that sometimes the dishwasher doesn't properly complete the rinse cycle and that will occasionally ruin small clumps of drinks, and he's complained about the problem on several different occasions. I'm guessing I'm the only person who could tell because my drink was water based, and most of the other drinks in those types of cups are beer, which is rather hard to overpower. This whole time the barista is walking in and out of the back room and refuses to ever look at me.
At this point my head explodes, I take my free latte, profusely thank the manager, stuff a few bills into the tip jar for the awesome waitress, and leave.