I have the impression that the Biogents Sweetscent™ smell evaporates earlier than suggested. Should I exchange the Biogents Sweetscent™ before the course of two months has expired?
No. The human nose becomes accustomed to the odor and after awhile does not smell it anymore. In addition, it can be that right after opening the package a large amount of the scent is released for a short amount of time. The scent is actually still there and very efficient throughout the two months. Therefore you do not need to change the Biogents Sweetscent™ before the course of two months has expired. However you cannot wait longer than two months to change the Biogents Sweetscent™ to ensure the effectiveness of the Biogents Mosquitaire™.