J.J.
My little one went thru a hate bath phase around that age.Now if he gets anywhere near a tub he climbs in faster than you can blink! My suggestion is that if he can sit up try one of those open sided bath seats..you know the round ones with the open sides. My kids loved theirs and it made bathing them easier b/c i didn't have to worry about holding them up or them slipping. You can get them at walmart or anywhere else. He may not like the baby tub anymore b/c it's cold or it doesn't hold as much water and playing in the water is half the fun.lol. You could also try putting him in the shower with you or daddy. My youngest has been showering with daddy since he was about that age and he loves it.So does daddy they get their quality time together and get clean at the same time!