I've just bought 2 of these, one for airing cupboard and one for wardrobe, having spent out on Moth Stop last year for walk-in hanging space, so can't yet say if they work. Lost several nice woollens to moth-holes this year. Though hunting them nightly with a spider catcher, they had probably already eaten. I would comment that these are hard to activate, though. I had to enlist someone with a stronger thumb than me, and even he struggled. You have to push down the plunger, breaking a seal. Why do all these products only last 3 months? I would on that lasted a year, at least. Or a refill?