Product review (1 stars): You don't need it.
You don't need it. I bought a Sunbeam SCM2401 table top humidifier at a local store. It worked fine for 3 days, then the little filter meter became pinned at the "Change" side, showing that the filter wick was dirty, and the humidity in my room was only 20%. Sure enough, the wick was totally dry, and there was a line of rust at the water line. So I washed the wick under running water, and scrubbed it with a brush. That restored it for only a few hours. OK, so I'll just buy a replacement wick. What?!! $6 and up? For a piece of cotton? The whole humidifier only cost $18! I lived in my dry apartment for several days, and then had an idea: Paper towels are very absorbent. What if I took 2 squares of paper towel and folded them around the old wick, like a U-shaped sandwich, so that the paper towel dipped under the water level and up the sides? This worked, and has kept working for 4 days now. The paper towel AND the wick now stay completely soaked, the little meter is happily in the "Good" zone, and my room humidity is a comfortable 38% (it's winter, and the humidifier is on MAX). When the paper towel gets rusty, I can just replace it for a few cents. Cheap, convenient, and "green"!