(1) Wow I never though of that. That would have saved us a lot of pain! (2) I'm a bit nervous about recording my biometric data if it's not entirely offline, but I think the people I'm doing this with are likely to try this.

Thanks for the tips!

I don't remember where I've read this so it's not very high confidence.

The idea is that glycine lowers core body temperature, and that body temperature needs to drop a bit in the course of falling asleep