Go get a bottle of this: http://www.lucasoil.com/products/display_products.sd?iid=28&catid=9&loc=show
and start using it to top off when the fluid gets low. It won’t hurt anything (especially since the “hurt” is already done), and if anything is going to help it would be this. Its a little expensive but I’ve been using it to control a PS leak for quite a while now. It won’t “fix” anything and probably won’t “stop” any leaks. But it normally will at least slow them down a lot.