Toddler and baths

My son started hating baths sense 6 months ago (broke up with his dad so he started going there every other weekend ) he’s now 14 months and just can’t seem to get him to like them again. My tips? I’ve tried having him in the tub before the water I have given him his baby sponge. And toys. Was thinking of trying the crayons ? Please help a mama out I don’t like him being upset or scared