Hello Hector. I am sorry you are not happy with the fogger. The effectiveness of the insecticide is relative to the temperature of the fogger. It's very important to allow the fogger to preheat for at least 2 minutes before fogging. For the optimal fog, you should squeeze the trigger slowly and steadily every 3 to 4 seconds. Every time you are squeezing the trigger, the fogger pump is forcing the insecticide through the heat-conducting coil. The heat instantly vaporizes the insecticide producing a white fog. If the fog is thin and yellowish, the insecticide is too hot which means you need to increase the pumping rate to cool down the insecticide. If the fog is dripping from the nozzle, the insecticide has not had a chance to reach the optimal temperature; therefore, you will need to decrease the pumping rate. After trying these steps, and you are still unsatisfied with the results, please contact us at 1-800-311-9903 so we can better troubleshoot the issue. Thank you for your feedback Hector.