The only constant is this: It varies.

I start with the buttons on the right, because I am right handed and that's easier for me. I start with the top button and work to the bottom.

If silence has not yet been achieved, then I do the same with the buttons on the left.

If silence has still not yet been achieved, then I make a mental note to never give that location any money ever again. (It's a short list, and the irritation makes it very easy to remember each location whether I want to or not.)

(I don't worry about how "brute forcing" might be interpreted. I am doing nothing wrong.)