it is not uncommon to occasionally see some frost-like spurs on the surface of shower steamers. fret not, these little spurs are not moldy, nor are they harmful; they’re a sign of the recrystallization of menthol crystals. we have chosen to dissolve our menthol crystals in water and not alcohol which can occasionally create this issue. our shower steamers are made fresh to ensure the best quality and customer experience so recrystallization might happen once in the package because it is sealed for product longevity.