I think the used car dealer lubed my windows before we picked up my truck this past Monday. I remember when I test drove it they were sluggish and I searched and read all about window woes on here. Then the day we picked it up I noticed the drivers window went up and down so fast it startled me the first time and the passenger window went up evenly instead of one side dropping like it had. But I do plan to get me some window lube soon so I can keep them running smooth as long as possible.