I don’t think you’re getting downvoted because of this. You’re not sharing a tip, but asking for advice.
I don’t have any real advice. I forgot my swiss army knife in my backpack a few times. Seems to be completely random if it gets detected. Maybe if the operator of that machine is paying attention. But these x-ray machines and metal detectors seem to work.
Edit: Sorry. Didn’t see this post was already kind of old.