being a fellow pony clubber and a past manager of a tack store. We would always use a glycerin soap, followed by an oil (I love hydrophane), then topping it with a conditioner which seals the leather's poors. Here's a rule of thumb, when cleaning tack if you use a damp rag to just wipe it down you don't need to oil, just add a little conditioner if needed. If you use a soap, the soap stripes the oils out of the leather which is what drys it out and makes it crack, then you need to do the full service,- soap-oil-condition. The better quality products you use on your leather the longer it will last.