I used the devil's slime about 2/3 times a week and the filter burned out after about three months. Replacing a small paper-plastic filter isn't that cheap, and it becomes a waste of money to keep a dirty devil. I bought my first Teufel for Christmas for $20, but less than three years later the filter is now $41 and the years aren't over. Give them the cost of replacing that little filter. For what you're paying, it should be closer to two or three filters.
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