Dehydrator - Herbs

I usually just freeze herbs chopped in ice cube trays. Bay I just pick a load at a time keep it in the food cupboard in a container without a lid, it drys naturally. Never tried rosemary to thyme. Never grown enough to try it. Frozen or dried. Only thing I’ve tried in the dehydrator was oregano. It didn’t go well! It dried fine. But it lost all it’s scent & flavour very quickly after storing in a jam jar. It smelled and tasted exactly like straw !