Hi Macy!!
You HAVE to be diligent with this, mol, you HAVE to be, don't know what else to say, mol.
It might not be the crystals, it might be a bladder inflammation. He feels he has to go all the time, even tho he doesn't, so he will get in the box, frequently, and only pee a little, cause, thats all that is in there. I went thru this with Prowler. His bladder walls were inflammed, because his urine was too concentrated.
He was getting wet, mixed with water, so it was real soupy, once a day. Now he HAS to have the increased water, twice a day, to keep his urine, diluted, per say.
Take him to the vet, do not wait, and ask them to do a clean catch, and check his urine concentration. They insert a needle into the bladder, and draw out the urine. It only takes a min, and they do not put them under, Prowler was fine.
Tell them to send it to Antech or Idexx.
I forget now what Macy is eating, or will eat or not eat, mol, but it is imperative, cannot stress this enough, they have to be on a grain free foodie, have to be fed wet, mixed with water, so its real soupy, twice a day.
You cannot use tap water, it has too many minerals in it, you have to use purified drinking water, and you have to put several bowls of water, thru out the house.
If you continue to feed him, foodies with grains in them, and your not increasing his water intake, to keep him flushed out, and keep his urine diluted, then yes, you will continue to have these problems. Once you have a crystal kitty, you have to do this, have to.