I offer window washing to homes and
one and two story buildings.  Window
washing is usually added on to a house cleaning starting at $2 and $5 for giant windows.
The inside windows are recomended to be done starting at $2 a window and go up to $5. I also take off all the paint specles.

I use Sprayway Window Cleaner.

If you need just the Windows done the are done as a set price for the out side at $50 usually about $75 for just the out side. And it is $2-$4 per window for the inside.