Instruction: Answer the given question by extracting information from the supporting document.

Input:
Question: Was anyone else missing the demineralization cartridge ? Mine (bought retail at BBB) didn't come with one.
Document: Even my new laptop had white dust inside the disc drive, and my closet had louvered doors and it even got in there. The season has come again where I will need a humidifier but I have no idea what I will use because I thought I purchased the best one. I probably could have used distilled water as some people recommended but that would have been too costly considering I filled it every 18 hours. And besides that the signature "Demineralization Cartridge" filter was supposed to eliminate that. It was worthless.
I bought one of these back in the autumn of 2009. I run it every night during the winter season, and it's still going strong. I do need to replace the demineralization cartridge - it's started to emit white dust from the back vent. It has lots of options, so the front panel can be a little overwhelming at first, but you can just hit the power button and let it go. The pre-warming function really doesn't seem to make much difference - it's not hot steam by any means.
We bought one of these 4 years ago when our first child was born and it's been in use 8-10 months of the year ever since. I don't have a single complaint about it at all. As long as I keep up with replacing the demineralization cartridge every year or so, I never have problems with white film building up in the kids bedrooms. I'm online now ordering my second replacement silver ion stick (now called a hydro stick) which has done an amazing job keeping the thing clean.
I've tried the steam-type humidifiers, evaporative types, mechanical rotary sling-types (DeVilbiss), and ultrasonic units. They all have their ups and downs, but this is the best one I have ever used. It's also the most expensive, but the value is good because of its good design. Ultrasonics need water with low minerals, or else you will get white dust. Municipal water might be OK, but mine is not.
Anyway...this is why I bought the Air-O-Swiss. The ultrasonic idea seems just the thing. However...it is not all I thought it would be. First, you need to either buy distilled water or change the demineralization cartridge every 2 months. I did not look into the cost of this but I thought that this would not need any "supplies". Descriptions from the manufacturer and reviews indicate that the mist output is quite dry.
I bought this humidifier thinking because of the demineralization cartridge I would not have to use distilled water. The idea of lugging distilled water up to my bedroom anoyying not to mention the cost. After 2 weeks I noticed white dust every where! I went back to my $30 evaporative humidifier. I will say the Air O Swiss did increase the humidity in my bedroom but I cant deal with the dust everywhere.
Every couple of weeks, I rinse the interior of the unit, and the tank. If you use hard water, you may have to descale the unit. Air-O-Swiss recommends their own descaler, but there's no reason why vinegar won't work.Consumables: There are one or two consumables: the demineralization cartridge (which we do not use), and the ionic silver stick. Both are pretty pricey, especially the latter, even though you only have to replace it annually.
I thought I had finally found the perfect humidifier - it's ultra quiet and relatively easy to clean. It works beautifully in all aspects except it produces A LOT of white dust, no matter how often I've replaced the demineralization cartridge. I've tried many different humidifiers with bad results, except Venta, and have read so many negative reviews about those that I wouldn't buy one.
I know most of the great reviews of this humidifier are soon after buying this unit. Well we did like this unit enough to buy another the following winter as well, but I am sorry to say that after 2 winters, we dumped the first one. The unit seems to harbor some brown mildewish algael growth that comes back even after we've soaked the base repeatedly in vinegar and replaced the ionic silver stick and demineralization cartridge each year/three months respectively(not cheap at $25/15 each).
It's true I got mine from bed, bath and beyond and within days white dust started appearing everywhere and within a month my entire house with covered in white dust.The stain on my glass dinning room table will not come out, my new 51" LG tv has a film over the screen. I had to hiring a professional maid service to completely wipe the entire house down.
Answer: Someone returned it I bet & kept the cartridge. Take it back to BBB