Best Popcorn Makers for Surface

I took the advice of some other users and did not over tighten the metal arm that stirs as it pops and have had no wear on the non stick surface.

And I was disappointed that the stir rod was bent incorrectly at the factory, allowing one side of it to scrape quite severely on the cooking surface; if left like that the nonstick coating would have scraped off in no time.

I haven't owned a popcorn popper in a long time and am still trying to figure out the point of the nonstick surface on the popper base.