I really doubted if they worked. I live on the coast so there is a lot of humidity and mold can be an issue. I didn't want an air dryer to look after. They work just as advertised. Each lasted more than a month or even two. But it will likely vary depending on how wet the area is. I put it in a small bathroom and it was perfect. The only downside is that it has to be outside and you have to figure out how to hide it so it doesn't look unsightly or you just don't mind having it outside. Also, I really like this product and will definitely order it again.
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