One has only to read the description to realize that the principle is totally absurd: "To regenerate the product, simply place it in the microwave oven, heat the minutes and all the moisture evaporates." And in your opinion, the moisture that evaporates from the microwave, where it returns exactly ??? Well obviously, she returns to the kitchen where the microwave is, and just saturate the air said moisture kitchen ... So this is completely stupid and against-productive course ... Totues of ways, these moisture absorbers absorb only a small amount of water, they are useless ... If you have real moisture problems, we must first tackle the problem based (improve ventilation and isolate to scoop condensation) and possibly invest in an electric dehumidifier in cases where we can not deal with the problem immediately or easily ... This is my case, so I bought a dehumidifier Zibro / Qlima D510 ... FYI, Amazon has the D512 model on sale in 199 ... This is very good material and especially VERY effective: in 2 days I have already recovered more than 6 liters of water !!! The water recovered in a tank having passed more through 3 filters (one microparticle and another activated carbon) it can be reused to water plants as demineralized water for irons or car battery or washing -Ice, or to flush the toilet at ... And besides, what is spent on electricity for the dehumidifier is partly recovered on heating savings generated because dry air is less energy warm moist air that ... plus it's healthier, oin breathe less humid air and rid of its dust and allergens ... In short, do not be fooled by these products' moisture absorbers "cheap, even from reputable brands, they are effective at best in a closet, then for a bedroom or bathroom rather invest in "serious" material, it will be more profitable in the long term !!