Only my DD2 did not have a bath every day as an infant (was way OS by a bath at bedtime so we only did it in the morning as needed!). The other two have been bathing nightly since they came home from the hospital - mostly just plain water, no shampoo or soap unless absolutely necessary. I never intended to bath DD3 nightly but she loved it and it was much easier to toss her in while the older two were bathing.