I use the plastic ones. I’ve got 2 kj’s and keep a set in my parts bin at home. They are cheap enough and change out fairly quickly.
on my ‘new’ 06, the previous folks jammed a firring strip under the glass and screwed thru the door frame inside to keep it in place
Jeep Liberty 2002 2006 Window Regulator Repair Kit Clip Rear Left - Right CS73 on ebay.
The directions tell you to drill out a rivet, but I bend the steel at the end with a screwdriver and a vise. Hook up to a power source and run the cable out the end. Screw a fresh one on and gently get it back in the channel.
getting pretty fast at changing them out.