I spilled orange juice down in to the automatic gearshift of a car once. It would have cost a fortune to take it apart to clean it, so I just left it. It was sticky for a while, and then just gradually went back to normal.
Well, some people don't like to cleanup old wallpapers and paint when renovating their home. They all rely on the one-in-ten owner who will take appart all the previous layers and build fresh to ensure the wall stay healthy and beautiful.
