Updating my review to add a star because, although the trap isn't very fast, it will alert you of an infestation in seldom used storage. Kept inside a confined area near a door you can check periodically, you'll know you have a problem that you can seek out and address before it gets too out of hand. The only caveat is that you'll need to replace according to the label or you'll have a false sense of security. This is not the best solution by a long shot (if you deal with lots of wool, scrupulously freezing, baking, or tightly sealing any incoming fiber is far more effective). Original review: I used this trap in a confined, sealed closet with a known moth population. Tested it inside the closet for a several days before I bombed it, and used others outside the closet to monitor jailbreaks. Because the traps only catch males, they don't work as a treatment, but theoretically, they should attract any male moths and alert you to a potential problem before it gets out of hand. If the traps had a highly effective catch rate, any males would get trapped before mating and that would be the end of that. Unfortunately, however, judging by the low volume attracted to the trap inside the closet--and the amount of time it took to attract *any* moths, I don't feel confident that this trap will be a good advance warning for a moth problem or mating preventative. It seems so weak that you might need a significant infestation to even alert you--and of course, by the time you have moths, the damage to your fiber has already occurred (adult moths don't feed; the caterpillars are responsible for the damage). I typically keep all wool sealed and segregated, and freeze or bake any incoming wool from unknown sources, but some outside yarn got tossed in a closet, and I ended up with moths. I tossed all the yarn and fiber in the closet to be safe (my real supply and personal stash are both stored in completely different parts of the building), but it gave me the opportunity to test out these traps. I'm still giving them 2 stars because they will catch moths eventually. I think they'd be useful monitoring a highly confined, infrequently-used space with low-value wool, stuff you wouldn't mind tossing, but I wouldn't rely on them for keeping your nice stuff safe. I also tried the other brand sold on Amazon. It was more effective, but still only in 3-star to 3.5-star territory. BTW, if you want to make sure any seemingly unaffected clothes are moth free (the eggs are really tiny, and even the larvae are small enough to miss), you can freeze or bake them. In a lab setting, all stages of clothes moth are killed at less than 10 minutes at 128°F (30 min at 120°) or 24 hours below 0°, so I bake everything in a hot car in the summer sun for several hours--over 130°, according to my oven thermometer--or deep freeze for a week or two. I figure the overkill will make sure the temperature penetrates through the fabric/fiber.
