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Title: Worthless Things
Review: I tried these, but the dome doesn't keep the filter in place so it's falling down into the litter! Grrrrrrr.I have put a dab of duct tape up there to hold the thing in place, and just rinse it, soak it with vinegar and put it out in the sun with the Booda and that's all that is needed each time I change the litter.
