I would e-mail to her maiden name today and say like Gucci said... "W, never mind on cleaning the house, I took care of it"
Let her see it this weekend. If she responds in any fashion I would take your sweet type and let her know once again it has been taken care of and you don't care to discuss it any further. No thanks, no "how are you's", no NOTHING but information.
Honestly, due to her lack of interest or assistance in the house I would stress to the agent you are the main contact, not your W. If you have any open house or news to report speak to the agent first then let your W know what you have decided. I would also keep a log of the work you are doing so if you do sell the house her portion of the proceeds will include compensation to you for the upkeep of the home. And I certainly would not tell her that until you have the check in hand and you give her portion with an itemized cleaning bill.
This may sound petty but IMO a house is one of the biggest investments you will ever make. One does not get to walk away from the responsibility of owning a home simply because (A) they decided they are not in love and (B) it's on the market. If she doesn't care to see the marriage through that is her choice but not seeing the house through is not a "free" option.
