Yeah, OP, you might have some experimenting ahead of you. Some cats tolerate total litter changes with no problems, and some need gradual changes to “take” to it - just so you know why, if you try changing and suddenly there are accidents on the floor. It’s a pretty clear “me no likey.”
I’ve experimented with a lot of different litters. I know a lot of people with cats (I work at a feline rescue, so the cats at the shelter, plus all of the employees and volunteers with cats at home. It’s quite a large pool), and you will get a different answer from just about everyone.
I have four cats at home, use four litter boxes, and largely use World’s Best. It’s a corn litter, much nicer to the land than the strip-mining to get silica litter, clumps very hard, better than silica, tracks little, and has a vaguely sweetish grain smell that is pleasant. It passes the finicky “mom sniff test” - if there was a smell, believe me, my mom would say so whenever she visits! If I decide to throw some scent in there, because I get paranoid and self-conscious, I’ll get either a sprinkle litter treatment from Nature’s Miracle, or a bag of Arm and Hammer natural corn litter, which I add just a small amount to each box and mix because I find the scent objectionably strong when using the litter alone. It’s really lightweight and I think it tracks more than the World’s Best.
Hmm. What else. Oh - there’s also Swheat Scoop, I know a few people who really like it. It clumps harder than anything out there. I don’t like it because though it clumps great and smells a nice grainy smell too, it tends to stick to the litter box and has to be scraped off. The stuff I use just kinda pops off the plastic in one piece.
Also - you can spray down the boxes when you clean them with an enzymatic cleaner, like Nature’s Miracle or Anti-Icky-Poo. Just clean them as normal, dry them off, then douse with the spray and let dry before refilling. I have two boxes that are at least 4 years old the the other two are about two years old. No problems so far, and they’re high-sided, very large, pearl-white and hard to find, so I’m hanging on to them as long as I can!
Please do scoop your boxes daily. This is directed at everyone reading this, not just the OP. Some feces-borne diseases are more likely to be transmitted *after * the stool has been sitting around over 24 hours. That’s why our shelter does complete litter changes and bleach-downs of all the litter boxes in the shelter every day. It’s a lot of cleaning, but the best protocol to keep the cats and the humans healthy. I admit I sometimes go an extra half-day before cleaning (so 36 hours sometimes) the boxes at home, but I feel they get a bit whiffy if I wait longer than that, no matter what litter is in there!
(TL, DR)
After all that, what I’m thinking is you might want to just try that Arm and Hammer Natural stuff and try just doing what I do with it and add a little to the litter you already use. It clumps, so no worry about it not mixing well with the clumping stuff you already have. It’s a pleasant but quite strong scent, so it might just do what you need to do without having to go through too much experimenting.
Good luck!