Gotta get it right or you'll order some wind instead of some wine. (Did that once, and that's how the difference finally stuck for me.)
What did the server bring to your table? A fan?
They understood what I meant, and then the French folks I was with had a long discussion with me about how it's not the same sound.
Yeah, I've been there. Apparently my pronunciation of "Chretien" (Christian) was indecipherable, and the French people I was speaking with clarified it for me by saying, "you're saying cray-tee-uh(n), but it's pronounced cray-tee-uh(n)"
And note that "crétin" means "dumb", so mispronouncing "chrétien" can seriously go wrong.
https://fr.wiktionary.org/wiki/cr%C3%A9tin