I can see how that could happen.I've noticed the same, with my hair and my kids' hair. However, it's more effective if we cowash 2-3 times a week regularly; cowashing only just once a week seems to lead to build-up faater for us.
Yes, yes, and yes. When it gets waxy I will deg wash it.Do you concentrate your shampoo only on your scalp, and not lather the rest of your hair? Do you use a sulfate free shampoo? Do you pre-poo? My hair will feel waxy after cowashing for awhile. If I at least lather my scalp and let the suds rinse down the rest of my hair, it will feel nice and clean and not stripped. I can't go more than a week without shampooing, even if I co-wash in between.
@gemruby41My hair responds better if I use a cleansing conditioner specifically made for co washing. When I co wash with regular conditioners, my hair feels dry.