A lot of my first cleans on windows with vents have come out a right mess. I spend a lot of time scrubbing them, and rinsing first clean. Come back later that night and there's a lot of drip marks. Windows without the vents are perfect? Does this normally just happen first clean? My mate who works with me doesnt touch them with the pole but they come out perfect, to me it seems lazy and half arsed though, but it works.. any tips, or should i just not touch them as well?