I use ettore squeegee off and tap water, but i kept getting white lines everywhere
From your backposts, I see you've only just recently started window cleaning.
I think you're problem is your squeegie rubber; unless the lines were just at the edges where you scrimmed.
However, when you first start window cleaning, change your rubber every day; turning it around at about mid-day.
That way you'll know that anything left on the window is down to bad technique, rather than dodgy equipment. As your technique improves; then you'll be to tell the difference between a dodgy rubber or dodgy hand-movements.
I feel a bit nervous about saying the following, because someone might give me a digging (intimating that I'm thick); but in my opinion, it does take a few years to learn how to use a squeegie effectively.
Once you crack the squeegying bit, the amount of time scrimming (otherwise known as 'detailing') will be reduced greaty.