My family and I have been doing a haunted house for quite a long time. For a few years now, we started using a wallpaper that you can hang up all around a room. However, it's been falling down quite often and it takes a lot to keep it up. We've used double sided tape and tried thumb tacking it even. It's a really flimsy plastic-type material. We had it up with no problem for a few years and now all of a sudden we're having problems. 
Can someone give us some tips, please?
Can someone give us some tips, please?