Cartridge for sleep

What's your favorite cart to buy to knock you out cold? I have severe insomnia amongst other things, and have been using weed for years to help, and it does. But what I like isn't always available and I'm really picky. I don't want to waste money on one that doesn't help for sleep. So I'm curious of the brand and strain of what you use that consistently works for you. I only smoke carts though. Leaf makes my nose run and my heart beat a little quicker, and I have to smoke too much of it. And the smell of everything that goes along with it lingers too long imo. Just way more convenient and that's me. Appreciate it!