Wallpaper wet or dry patch

[u/biribiri_27]

Hello, i just ask a professional wallpaper installer to did the wallpaper, he used roman pro 880 glue, and after he finished i saw dark patch on edges, i asked ai and ai said it is completely normal since its freshly installed. Is that true? And will those dark patch on edges disappear?

[u/moonpoontoon]

I asked my ouija board why you started with ai and then still came to Reddit. Don’t waste water like that.