I chipped my old non stick sticker so I had to order a new one. Note that even with the sticker, the prints still stick to the bed, and when removed leave marks and a bit of print behind. I ended up just using blue tape (painters tape) on top of these.
Removal of the old build sheet was a pain because the sticky layer tended to stay stuck and peel off the back of the plastic build sheet layer, leaving sticker junk on the metal. But once you got a system going and began to peel the whole thing off clean, the new build sheet stuck beautifully and prints stick like new to the printer