ALL-OUT MOSQUITO DESTROYER — 25% NOT IN USE

I regularly using your product ,ALL-OUT MOSQUITO DESTROYER. 2 months back I bought one bottle of ALL-OUT DOUBLE POWER batch -Aug 08, No.U4-095p . started using from the day itself. From this bottle we could not smell any-thing after switch on. but for past 10 to 15 days 25% of the liquid is still on the same level without any smell or exhausting, So we have to fight with mosquitoes phisically. only last day we found this. Are you filling more water ? .