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The best thing that I can tell you is to remove the bedding and cedar. You can replace the floor with a wire grate or other material that the urine can flow through.
You can also purchase over the counter odor agents at your local pet store. You can spray the area and it sometimes work to stop the inappropriate soiling.
This is a hard habit to break. At this point, you will need to deal with the symptoms as best you can.
Also, you should see the vet to rule out a bladder or urinary problem that makes her unable to "hold it."
Let me know if you still have questions.