Where can I find Wiper in Hürtgenwald?

Wiper can also be found in these cities:

Aachen Alsdorf Düren Eschweiler Herzogenrath Kreuzau Langerwehe Mechernich Monschau Nideggen Niederzier Nörvenich Stolberg Vettweiß Würselen Zülpich

You can also find this in Hürtgenwald:

Cheese Particle Lemon Aroma Jam Ice Cream To Portion Poultry Still Water Coffee Pods Poppy Seed Roll Canned Fruit