Sometimes, I feel like I'm speaking another language,

MY WINDOWS WORK GREAT, SEVERAL TIMES A DAY!

Yes I lube them, once a year as they start to dry out in the summer.

My windows work great, because the glass is centered and the regulator arm is UNDER the glass, when it is up and when it's down.

In plain talk, our window regulators get out of their designed position. Then they rub too hard in the front, causing tilt. AND / OR they are pulled toward the inside of the glass. Causing the tabs to bend (then break) trying to stay under the glass, while the regulator arm pushes up away from the glass.

And I just used plumbers putty to put my broken into two window tab.
It still works because there is NO STRESS on my window tabs.
Sorry, there is no factory adjustments.