Where can I find Heavy duty detergent liquid in Lahnau?

Heavy duty detergent liquid can also be found in these cities:

Aߟlar Butzbach Giessen Langgöns Lich Lollar Mittenaar Münzenberg Pohlheim Reiskirchen Rockenberg Sinn Weimar (Lahn) Wettenberg Wetzlar

You can also find this in Lahnau:

Vegetable Juices Instant Iced Coffee Cheese Roll Canned Fish Fat Sauce Powder Spirits Stews Bakery Products Red Wine