I use honest shampoo and body wash in one and you have to use conditioner too I use honest conditioner also just like you would shampoo then condition your hair baby hair needs it as well. I used to use Johnson and just shampoo and my sons hair would be so dry and brittle afterward once I switched brands and started conditioning his hair is so soft after washing and I just let it air dry and then grease it
You could also try a conditioning spray like SheaMoisture for kids/babies
Childs farm shampoo & conditioner. The also do a leave in conditioner spray z
Mustela shampoo
Cetaphyl for babies is soft for their skin and for the hair.