A month ago I perchased a used, leather, close contact, english saddle with leather stirrup leathers. I was wondering how much do you need to wash and or condition the saddle and stirrup leathers. I've heard some people say once a month and others say after every ride. Also, I've heard some people say that you need to switch the stirrup leathers if they're leather because the holes strech. Is that true and how much and for how long would you need to switch them?