You may just need to give your hair some time to adjust to the CG method. Also, many wavies find that they need regular low-poos. I either low-poo or use a cleansing conditioner basically every day, straight co-washing doesn't work for me more than 1-2 times per week. What stylers are you using? Sometimes those can be the culprit for greasy looking hair. But overall, I'd say just hang in there and give it at least 4-6 weeks for everything to even out.