I don't use any fragrance, I just use Optimum Protectant Plus, which leaves a nice leather scent behind.
Personally i love the smell of Optimum Protectant Plus, as mentioned already...but i like to follow up with CG Leather Air Freshener...i love it!
I sometimes use a disenfectant spray )spelling?) that has a light clean scent. Used to get it in gallons from a local janitorial crew, but I don't think they can get me anymore. will have to find something else.
I have an CS-X3 squash scented air freshener in my car. I love it but it goes out fast and is quite expensive to refill.
Ozium imo gets rid of everything. I kinda like the air vent spray from IZ it leaves a smell like cockpit premium in your air system
I also ask the customer I have a couple of cannisters on-hand, just put one under each seat when I'm done. https://www.autoscentsinc.com/xcart/home.php?cat=1
I thought my air freshener was expensive! That's pretty pricey, one under each seat? You are putting multiple canisters in one vehicle at a time? Not sure if that's what you're saying or not but sounds like a lot of scent, and money.
Not the full canisiter, there is about 40 pads (1in x 1 in) in each cannister, just one pad under the drivers seat.
They last for around a couple of months. So far I the scents I have are Fresh N' Clean, Mango Tango and Mountain Air.
I bought some Yankee Candle "Car Fresheners" at a local Hallmark store not long ago. They had a "Leather" scented one so I thought I'd try it. I really like it. It's a bit strong, but it does smell more or less like leather, and seems to last forever. Years ago I took to stuffing a couple dryer sheets below the seat. That worked pretty well too, and was basically free.