I used an ACV rinse after CO washing today just to see how an ACV rinse alone affects my hair. (I didn't want to try shampoo bars and ACV rinse at the same time for fear of not being able to distinguish which method had what effects.)

Before I begin using shampoo bars I want to ask, how often do I have to use an ACV rinse? It'd be more convenient if I didn't have to do it after every wash. I also don't want it to end up drying my hair over time.