1. Find the brightest light in the house, or the light that most of the moths prefer to crash into.
2. Set the plate directly under that light so that the light. This works best if the light does not have a base below it, but is in the ceiling or attached from above.
3. Fill the plate with water. Most plates have a little lip on the sides, and they will be able to hold at least 1/4 inch of water.
4. Squeeze the dish soap into the water. Do not mix, mixing will cause bubbles. The dish soap is only added to enhance the reflective surface of the water.
5. The moths can't tell the difference between an actual source of light or its reflection. They will fly into the light bouncing off the water and get stuck. Some moths will still hang around the actual light but this is an easy way to cut down on the number..
http://preview.tinyurl.com/dbehzh