Removing and replacing glides on chairs and tables is super easy, and it is a repair that anyone can do to ensure that you have happy furniture.
First pry up the glide with a screwdriver, but pry away from yourself because the screwdriver could slip. We've made this mistake a few times, and it hurts.
Next, using a tack-pulling or prying tool, pull the glide the remainder of the way out. You are essentially removing a nail. Install your new glide by hammering it in. Use a mallet if you have one. If you are using a hammer, place a couple of layers of duct tape on the end to avoid marring your glide. Pretty easy, and your furniture is ready to go!