Everyone who uses a tacky cutting mat knows that over time the effectiveness of the mat declines. While the cutting mats aren't terribly expensive at only about $5 each, that can add up quickly over time.
Can cutting mats be re-conditioned and have the life extended? Yes!
There are differing methods for cleaning and re-stick your cutting mat:
If your mat is in rough shape, you can clean it first using goo gone or a similar cleaner, and then re-stick your mat.
There are lots of great videos on YouTube on how to perform the cleaning and re-sticking.