I'm going to be brutally honest here: I am really, really awful about cleaning my tack. One of the huge perks about endurance and beta tack is that you dump some water on it, maybe scrub a little, and you're good to go. Leather, though.. ugh, that's real work.
I had some Horseman's One Step cleaner/conditioner for a while. It wasn't terrible or anything, but the last time I saw it, the heat pretty well destroyed it and it had separated into oily/not oily sections. Ugh. I suspect that was probably last summer when I finally tossed the whole thing. Also known as.. I hadn't touched any of my leather tack with cleaner or conditioner for at least a year, probably more. Oops?
Mostly, I don't care. I should, but I really don't. I couldn't be bothered to go out and buy more saddle soap, find more rags, and condition my tiny collection of leather tack. Two bridles, stirrup leathers, two saddles (one sitting at home, one Eurolight).
It would not do, however, to list a dirty saddle for sale. I could not bring myself to do that. So: off to Higher Standards' shop I went, and purchased two, and lo, they arrived quickly and with bonus peppermint! Ponies always like bonus peppermints.
Mostly the saddle didn't look too bad, with one exception: behind the crupper ring. The brass snaps on my cruppers rub the saddle no matter what I do. It looked pretty awful, and previous half-hearted attempts with water and a rag went absolutely nowhere.
Also, it smells amazing and isn't difficult to use. Sponge on, rinse, sponge again and don't stress too much if a bit is still on there. Again: would be easier if I cleaned my tack more than once a year, but the reality is that I don't.
Even so: I think I like this soap enough that I might make it up to three or four times a year. Novel!