The only other way "barneyboo" is with extension poles.
This is not easy though, depending on the accessibility of the windows and the amount of space around your house.It's probably best to have two poles:1 for the applicator and the other for the squeegee.
Professional window cleaners using the pole system would have distilled water running through the pole/s because it doesn't smear but a D.I.Y. version is available from most do it yourself stores but for safety reasons they don't have water pumped through them.
You would have to use a bucket and some soapy water.
I hope this helps.