J.M.
Hi R.:
Your little guy wouldn't be the first to be a bit frightened of A bath.It could be anything.Something as simple as hating getting water or a little soap in his eyes.However,I think it's the chair.Children hate feeling confined,especially when they get to be his age.I'd back off and just wash him down with a warm wash cloth and soap,then after a week,I'd get rid of the chair,get a rubber mat for the bottom of the tub,and I'd get in with him.Take some toys or empty platic bottles for the tub and make it fun for him.Once he sees that its safe for you,it will build up his confidence,and he will feel more at ease.I wish you and your reluctant little guy the best.J. M