Products stuck in crafter. Why don't they come out?

Do you mean that you can see the result-product appearing in the little inventory when you click the crafter? Check so that you don't accidentally push them back with e.g. a reverse conveyor on the exit side. Or do you mean the components in the inventory keeps rising in number? Check that you hare not pushing them in too fast, it takes 1-5 seconds (depending on upgrades) to craft a product, if you push in components faster they will just build up. If not that either, then I don't know 😃