We have two of these mosquito magnet distributed in the house in order as quickly as possible to have a hand. The unit has the former glass-paper solution almost completely replaced. Only large insects with spreading extremities (large house spider, Schneider, gnats) still need the glass. The length of the device and the transparent chamber feel, as opposed to the glass (with human hand over), the insects less threatened and caused to flee - the hunt is somti successful than with the glass. Processing Technically we have been able to detect any defects.