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Natures's Miracle is a good cleaner so that isn't the problem. However, if this is a carpeted area, you need to let the cleaner soak in as long as the urine did. Urine soaks down into carpet, into padding and when it hits the subflooring, it pools outward. If you just clean the top carpet, you don't reach all the urine so the cleaner doesn't break down all the protein and remove all the odor. So that may be part of the problem. The same thing applies to crevices in flooring as well.
Beside that, there isn't much you can do training wise since she does it when you are not there to stop her. If she does it when you are there, you need to leash her to you to stop the behavior. For times when you do go out, you could crate her.
What does concern me is that she may have a medical cause for the urination such as a Urinary Tract Infection. Common symptoms of a urinary tract infection are frequent urination, dribbling urine, blood in the urine, squatting frequently to urinate, strong odor to the urine, inappropriate urination and straining to urinate as well as an increase in fluid intake.
A dog with a UTI does not always show all the symptoms and typically displays 2 or 3. I believe you need to have your Vet check your dog out so it can get medication for the problem if your dog is displaying 2 or more of the above symptoms..
Other causes for increased thirst and frequent urination include kidney failure, diabetes mellitus, cushing, a uterine infection (called pyometra), and liver disease to name a few. You can read about this here:
So if your dog is displaying more than one xymptom such as urinating more often or drinking more than a cup of water for each 8 pounds of body weight each day, then I'd have her checked for a UTI or kidney issue.
Now an option that might work is an indoor fence system. You can set it close to the doorway to the living room so she isn't able to enter the room. See an indoor fence system here:
That will keep her out of the area. If you feel there is a valid reason for her to need to urinate, you might provide an indoor area for her to eliminate. If so I would recommend a sod mat. You take a large pan like a kitty litter pan or even a baby swimming pool. You create a platform frame with wire on top. Place newspaper or other absorbent material such as wood shavings under the platform and place sod on top of the wire frame. Since it is grass, your dog will go on it. You can remove solids and can spray the urine so it moves through and down into the absorbent material underneath. This lets you use the same piece of sod for a while before needing to replace it. You do need to replace the material under the platform.
To sum up, I'd get her checked over by your vet, clean the area again being sure the cleaner soaks into and down to the padding. and perhaps find a better barrier system like the indoor fence.
I hope this information is helpful to you. If you would like any additional information or have more questions please don’t hesitate to press the reply to expert or continue conversation button so I can address any issues you still have . If you do find this helpful, please take this opportunity to rate my answer positively so I am compensated for my time.