Castile soap is made from Olive Oil. Though it is great for the babies tender skin, it can over time coat the fibers of cloth diapers and wipes. This may cause the diaper insides to be sticky and may attract dust. Eventually, castille soap can cause your cloth diapers and wipes to be less absorbent and repel moisture over time. We recommend not using castille soap to ensure your diapers keep working for you.