Matt,
The fact that your ex partner has found work is not luck, you just have to get out there and tout for it, it will not come to you.
I have always found that with window cleaning Joe Public is lazy, you can stick adverts out everywhere you want, you can push flyers through a thousand letterboxes and I bet you will be lucky to get a dozen jobs from them.
Knocking on doors is the only way to get any real quantity of domestic work. Pick your time for doing this, remember, most people are out during the day, go early evening or weekends, make yourself professional and provide a quality service at an affordable price and then the work will come to you from people seeing you out and about and from recommendations.
I had a woman contact me before Christmas, we do her daughters house in a different area, she wanted to know if I would do her house as well because they couldn't get a window cleaner. I went to have a look, priced it at £12.00 and she was happy. While I was there I knocked on a few other doors and within an hour I had 8 more houses and well over £100 of work for the lads to add to their rounds in the New Year. I can guarantee that once people see us about and get talking, we will pick up more of them. I put flyers in all the houses where I got no answer from (20+), not one has got back to me, yet it was obvious that they all need cleaned desperatly!! I will go back in the New Year and try them again.