Barista dilemma

Here’s my question. From time to time I go to this one cafe. It’s a bit far from my office, but the atmosphere and the coffee are excellent. Thing is, their barista is slow and spacey and gets my order wrong: I ask for almond milk, she ignores the message on my cup and begins to steam regular milk unless I stop her. My normal habit, when I pick up a drink, is to smile, say thank you, make eye contact. At this place, I’m having a hard time expressing anything but mild irritation. This makes me feel like a petty asshole, but if I try to fake a pleasant smile I feel like bland phoney, and I’m sure it shows. One more piece of the puzzle: the drinks at this place are expensive. And while paying $5.50 for a latte isn’t a major investment, I feel like at that price I shouldn’t have to babysit the barista. So how should I approach this? Suck it up and ignore the barista’s behavior? Send a tweet to the cafe with my complaint? Stop thinking about it at all?