What type of saddle is it? Brand? Age?
Generally, I like to clean with a glycerin saddle soap bar, or Lexol's spray cleaner. You want to clean it with soap every 5-10 rides. You should wipe it down with a damp cloth, to remove dust and dirt, after every ride.
For conditioning, I like Hydrophane conditioner. It's an oil based conditioner that preserves the leather and waterproof's it. I only oil with a heavy oil like Neatsfoot if leather gets really dry or I'm trying to restore old dried out leather. Hydrophane does the trick nicely if you keep it up. I use conditioner no more than once a month when the tack is in heay use, usually every 2 months. If you're in a drier climate, you could use it more often, like every 2 weeks.
You do not want to condition your leather more often that that. Over-oiling can weaken the leather fibers. You don't want the leather to get dry, but you also don't want to put conditioner on leather that doesn't need it.
Tack wipes, for quick cleaning: Hydrophane Glycerine Soap Wipes and Leather Care -EQUESTRIAN COLLECTIONS.COM Lexol Cleaner Quick Wipes: Legacy Tack
(a damp rag works just fine too though, lol).
Glycerin bar: Fiebing's Glycerine Saddle Soap Bar: Legacy Tack Fiebings Glycerine Bar from SmartPak Equine
Hydrophane dressing: Hydrophane Leather Dressing: Legacy Tack
Other good conditioners: Hydrophane Leather Conditioner: Legacy Tack Belvoir Tack Conditioner Spray from SmartPak Equine Passier Lederbalsam from SmartPak Equine Hydrophane Leather Dressing 1liter and Leather Care -EQUESTRIAN COLLECTIONS.COM Pharmaka HC Beinenwachs Lthr Balsam 1000 and Leather Care -EQUESTRIAN COLLECTIONS.COM NF Oakwood Leather Conditioner and Leather Care *|*EQUESTRIAN COLLECTIONS.COM Belvoir Leather Balsam-500ml and Leather Care -EQUESTRIAN COLLECTIONS.COM
Other good cleaners: Hydrophane Liquid Glycerine Soap 17 oz and Leather Care -EQUESTRIAN COLLECTIONS.COM Pessoa Liquid Glycerine Soap 2 and Leather Care -EQUESTRIAN COLLECTIONS.COM NF Oakwood Liquid Saddle Soap and Leather Care -EQUESTRIAN COLLECTIONS.COM Hydro Sadd Leath Cleaner -17oz and Leather Care -EQUESTRIAN COLLECTIONS.COM
Leather New can put a film on the leather, making it harder for conditioner or oil to penatrate. Leather New is fine for cleanings, but when you want to condition, use one of the regular soaps or cleaners, that won't leave a residue. LEATHER NEW and Leather Care *|*EQUESTRIAN COLLECTIONS.COM
Here's a nice all-in-one kit that has premium products that will do a good job of keeping your leather in good condition. Passier Lederbalsm is a great conditioner and a little goes a LONG way! I use it on my leather gloves too
. Tack Cleaning Kit from SmartPak Equine