Have you brought her to your vet? There are many things that can cause a dog to have urinary incontinence.
It may be something like diabetes or Cushing's syndrome that are causing the dog to urinate more. These may be treatable so it could be worth getting her checked out.
Also, if it is urinary incontinence e.g. caused by spaying and not another disease process, there are two drugs which may work, they can each be tried individually or both given together.
Maybe worth a discussion?