I will first say, go to the dynazap website, they have some great info on cleaning, maintenance, etc. After looking at our zapper this morning I thought "How am I supposed to clean this thing?" I found the excerpt below via DynaZap: --------------- Here are the steps you should take to clean your zapper safely: Unplug the unit from the outlet to power off before cleaning. Remove the 4 screws from the bottom of the unit to release the access door. Gently tap the unit to get insects to drop out of the bottom of the unit. If available, use a leaf blower, vacuum, or similar device to remove insects. After cleaning, replace the access door and secure with the 4 screws. During the height of insect season, you might find yourself cleaning your zapper more frequently. Check on your zapper and the collection of debris or dead bugs weekly to decide whether you need to clean the device out. Always clean your DynaZap® at the end of the season before you store your device. This way, your zapper will be ready to go next season (and you aren’t attracting other pests with the collected insects). --------------- That said, for us, it worked well. We live on 24 wooded acres and the amount of bugs at times we get at night it crazy enormous, especially around our back entry door. When my husband leaves for work at night and turns on the light to see, all these bugs are everywhere and fly into the house. I am hoping this Dynazap will help thin the mosquitoes and buggies. As you can see from my pix, after just one use the bugs are coating the UV bulb and they are left dead all over the deck. Thus, I would say it is effective for us. I will probably move it soon away from the house to lure the bugs away as suggested by Dynazap. I kept it close so I could keep an eye on it at first. My one complaint is the super super short cord. To me, that is kinda ridiculous. Overall, though, it gets the job done.

This was after the first 21 days. I bought this because the flying. insects were so bad no one could sit in the dining area or make food in the kitchen. With no garbage disposal, wrapping unwanted or expired food is paramont.

This product captured some a big bug, fly and gnats. When I used at another home, it captured over 10 gnats. I am satisfied with the results.