Installed them on the Subaru Legacy that uses a 18″ along with a 22″ and they work good. Then I spray some of the monster cleaner on the fresh microfiber cloth (never spray on the screen) and use that to wash the screen. I purchased it for my automobile as well as my wife’s. I’ve not tried on the extender on my automobile however however I have tried them as dust cloths and for cleaning my laminate flooring with, which works out fantastic. It is fantastic. I got myself the 36-pack when it was in my gold box.Read More