Is there any organic dishwashing liquid safe enough for baby?

We use dishwasher to clean our baby's bottles. At first, we use dishwashing powder. But I found some powder left in the bottles after washing. We were scared that our baby might get some of them. So we chang to use dishwashing liquid. The dishwashing liquid is blue. And I still saw some blue liquid left in the cap of the bottle. I worried about the effect of Environmental Hormone（which exists in the cleaner）, so I want to use organic dishwashing liquid. Can somebody give me some suggestions?