Andy, can I just lightly spray the pad from the bottle? That was how I imagined it.
Yes you can.
But I prefer to use a damp traditional window cleaning mop to wet the window and then buff off with a dry vikan pad.
You use less vikan pads that way, and when they become too damp or dirty I change for another clean one.
I've used this method for years on regular work that have hard to reach interior office windows where desks, computer workstations, printers etc. prevent easy access to the windows to be able to use a mop and squeegee.
If done properly it will give an acceptable finish, and I've never had a complaint.
However for the first clean I would spend time getting up there with a mop and squeegee to give a thorough clean and then use the vikan on the high glass from then on.