Given that it's just so easy to wash the frames at the same time as the windows and the difference that it makes to the overall appearance, I think wfp is the way to go even on bungalows.
I have a brush attached to an telescopic broom handle for bungalows. It's about 3 foot collapsed and five foot extended. That's long enough to reach the difficult windows behind bushes etc and short enough so you're not decapiating garden gnomes with the back end of your 6 foot long pole.
If you want, you could always squeegee off, I suppose. But why would you want to do that?