I don't use no nonsense as found something better. However the best way to use any chemicals like this ( ubik, virasol, no nonsense) is neat.
Fill up a 1 litre spray bottle of neat chemicals, soak the window in water before spraying the chemical, only needs a couple of squirts. Work it in, leave for 30 secs if you have time, then wash off.
For top windows just spray the chems on the brush.