Almost nobody tells you this.
There are two different sleep problems. The entire supplement aisle is built for one of them.
Problem one: you can't fall asleep. You get into bed and lie there for an hour.
Problem two: you fall asleep in minutes. Then you wake up at 3AM.
Read those again. Be honest about which one is yours.
If you're here, it's the second one.
Now look at what you've been buying.
Melatonin is a timing signal. Its job is to tell your body that night has started. It does nothing at hour five.
Chamomile tea helps you wind down. It's finished long before 3AM.
ZzzQuil and Benadryl knock you out for a few hours. Then they wear off.
No screens, cooler room, earlier dinner. All of it helps you fall asleep.
Every one of those is a fall-asleep tool.
You have a stay-asleep problem.
A sleep aid that quits before your problem starts isn't a fix. It's a head start.