Furious fast evaporation!

I have the scent ordered directly from Lampe Berger - Sorry, no product evaluation is possible there, for this reason, the assessment on Amazon. Although the fragrance smells very good, but in terms of durability, I can unfortunately only awarded one star. After I set up the room fragrance, it has evaporated completely within 7 days. I would add that the Raumduft neither drafts nor heat heating was suspended, therefore so absolutely nothing has contributed to a more rapid evaporation. For this extremely short life is the room scent, smell good or not, just too expensive - Mitanbieter offer room scents that have a decisive and effective for up to 6 weeks use. Definitely not recommended!