Help please

My daughter's almost five months old and iv tried multiple baby baths including the fisher price 4in1 which cut up her feet and the basic grow with me one from target that has the reclined side and the toddler side and she slips down tbe reclined side until she puts her back on the hump dividing the two sections in the tub and almost pushes herself straight out of it yet the toddler side is far to advanced so neither work please what tubs is anyone else having success with????