We are using the good knight refill lotion since last 3-4 years. But from the last 5-6 months, it is not affecting well on mosquitoes. I changed the machine also. But same thing. In the active mode, the fluid is evaporating very fast. But mosquitoes still roaming in the room. 3 to 5 feet distance from the machine there is no mosquitoes. remaining all the room mosquitoes moving freely. The liquid smell is also same. Not smelling in the entire room. The liquid which they are selling for 90 days pack is coming for 20 days only in active mode.
Actually, the insect’s immunity will change day by day basing on the atmosphere. It is proven scientifically also. But Good knight manufacturers should be aware of out. So that they will change the drug power in the liquid. Otherwise, their sales will fall down rapidly. Right now I changed to another brand.