A little moment of madness

The newspaper phoned this afternoon to ask if they can send a someone to photograph our house for the article on Andrew Geller's work tomorrow at 9 am. As I had so much spare time I decided to wash the windows, at least on the inside.
I really don't know what possessed me. I can't wash windows. I've tried, believe me. Many, many times.
I've used Windex and Glassex and white vinegar. I've used soft cloths and paper towels and newspaper. I even bought one of those microfiber magic window cleaning cloths. It didn't get my windows clean but at least 10% of the price is donated to help stop domestic violence.
I would think the problem was me, my technique is lousy, except that last year Steven washed the windows outside and he did an even worse job. So bad, in fact, that I wouldn't let him clean them this Spring. I said I'd do it myself. And I have done, in the last hurrah of Summer. And they are horrible.
Other people have clean windows. How do they do it?
All window cleaning tips gratefully received.