I have dry curly hair, so I tend to condition or 'co-wash' much more than I shampoo. I tend to shampoo twice or three times a month, but I condition every day or every other day. When I condition, I scrub my scalp with the pads of my fingers to remove the oil. Before I shower, I check to see if my hair or scalp feels greasy or oily, and if it does, I'll shampoo it.