Cigar Oasis has long been one of the leaders of humidification in the cigar industry. Their no-hassle units power humidors across the country and keep cigars in perfect condition but occasionally these units need some maintenance. This is where Cigar Oasis’ water cartridges come in. These can be refilled 8-10 times a year and should be replaced once every year. They snap right into place and require little to no work. Note: all cartridges can be used with their respective older models.
I've had my Cigar Oasis for three years with absolutely no problems. The water cartridges come ready to go and can last close to a year before needing to be replaced when they won't absorb water anymore. Just be careful to only use distilled water!