From the time they started saying "yes, yes" and pulling themselves up, they began opening all sorts of doors, so I put these on all the doors I didn't want them to open, like the kitchen and bathroom ˊᵕˋ When we moved, I took them off, and as advertised, they came off very cleanly!! I have one left over, and since they've grown up and no longer need it, I'm putting it up for sale. If you need one or want to try it out at a good price, please do! Although it's unused, please understand that it has been stored at home and is not brand new ( ¨̮ ) Also, since the plastic case takes up space, I will remove the plastic case and ship it with the paper instructions ˊᵕˋ♪