Desperate to figure out how to feed my cat

My cat was recently prescribed prescription urinary food which the vet says he needs to be on for the rest of his life, Hills C/D urinary.

Here's the issue--he is PICKY. I've tried many times over the course of his life to get him to eat wet food. Every brand, every style(pate, stew etc), every flavour. Added many dif broths and toppers and he drinks/eats those and leaves the wet food lol.

He likes the dry food version but I'd really prefer he have the wet at least once a day to get him hydrated 🥺

I am going to take him to the vet for a checkup and will address this then but in the mean time... does anyone have any tips or tricks? maybe ways to change behavior, meds or anything youve tried to increase appetite? ways to make the food more appealing?

i'm at a loss and so paranoid he will get crystals again. please help