Here is what I learned on my other medicinal herbs that I've grown from seedlings. Earwigs are the worst when it comes to eating sprouts. They tend to go right for the smaller sprouts and will pretty much decimate them overnight.

Earwigs are also called pincher bugs, they're the ugly little black/brown things with the pincher on the tail end of them. They feed only at night, as well, so they're hard to find during the day. One thing that works for them that's organic is diatomaceous earth. Sprinkle that around the area of the sprouts. It basically acts as a thousand little knives that get into their exoskeleton. Diatomaceous earth works for other little critters, slugs and snails being other culprits.

Another thing you can try is earwig traps, which are reusable. Put some soapy water at the bottom of the trap. At the top a ripe piece of fruit (mango works best for mine for some reason), and they'll crawl into it to get to the fruit and drown in the soapy water.

Earwigs LOVE to eat herbs of almost any kind. Sage and basil being their favorite I've noticed. And they will most definitely crawl up into your potted herbs as well, so take care to tend to the potted ones.

Hope this helps