No, they don't work good for me , they work GREAT for me. I have to buy another for around the house. They keep mosquitos off me so well in the woods I told my wife about it. Now she uses it when working in the garden or when we have our 18mo. old daughter out playing in the yard. Heck I tell everyone I know that likes to spend time outdoors that the Thermacell is a must have. I need one of the holster things for mine. I forgot it last time I went hog hunting and really missed it. Best accessory I've purchased in a while.