I started out by using it in my truck cab. It worked really well but I discovered that I need to run the air to get it into the vents better. I then used it in my tubs of hunting clothes, worked amazing. The real test came with a buddies camper. He left a small piece of fish in his fridge the week prior to going in a youth hunt. His camper stunk, we used this product after he cleaned up the mess and the smell was gone in an hour!