first time on my old car had all clips in...
second time on new car had all clips in, but one window was left down a cm. other side was fully up.
third time had the clips from the second time and the new clips in... so two sets of clips...and the window was up.
there not that hard to nik when the clips are in... the first time, they only niked 1, so I tried to take the rest out with out taking the clips out, didn't take long at all,even with window up...