I don't oil the stirrup leathers, either. Oiling makes them stretch. The young equestrian advises wiping the stirrup irons after you ride to prevent rust. If she has old tack to recondition, she wipes off mildew, then soaks the leather in Clorox and water. After that, I'll wipe it and use a conditioner again.
Horn suggests using glycerin on tack before a horse show.
It makes the tack look shiny and good. Details, details Other avid young tack cleaners are in the Kentucky Horse Park Mustang Troop. Wash the bit as soon as you take off the bridle. Clarissa Locke says that girths are often taken for granted but should be cleaned after each ride. Be sure to clean off any hair or mud after you use it.