How do you signal that you’re *not* using AI for your writing?

I’m currently applying for jobs, and am really paranoid that my cover letters will sound like AI. I’ve been falsely accused of using AI for my writing twice now - thankfully both were low-stakes situations, but it’s a genuine concern. On top of that, the sector I work in is quite anti-AI, so I expect they’ll be looking out for it more than most.

For some job apps, I find that I’m able to sound natural, build a decent narrative, and maybe even go a bit off-piste to prove I’m human. But for others, I’m struggling to escape the classic corporate-sounding format, especially if it’s for a more traditional employer. And honestly, when I read some of it back, it does kind of sound like AI (even though it’s obviously not).

I’m aware of some of the classic AI pitfalls (emdash, “not just X, but Y,” things in threes, certain words, etc.) which is annoying as a lot of it is just how I write. I’m wondering if I’m missing something obvious, but also how others navigate this on a broader level? Are there any subtle signals that you use, and/or has it changed the way you write?

As if writing cover letters doesn’t suck enough already, I’m now spending more time and energy on sounding human than just writing the damn thing. Crazy. I know I should probably just get on with it, but hoping for some words of wisdom to help me do that!