I was having the same problem last week. I had to put a wrench on mine to twist it out. I bought a rebuild kit off ebay for about $5. I needed a punch screw driver to get the screw out cause I stripped it trying by hand. After I rebuilt, better than brand new. No rattle. Twists right out and after I kick it, it folds right in on its own. Its well worth the $5 and 10 minutes it took to rebuild it.