needed a new top-mine was so chipped.

I propped up the old one, the way you do to clean under the top, and removed the screw on either side of the prop up post. I slid off the top and then removed the vent so I could clean it and put it on the new top. I replaced the vent into the new one, put the props back in and then the screws. It may have gone faster for someone else-I am a woman of 68 years of age and struggled a little with it. All in all, it went very well.