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Title: This isn't the solution you've been looking for.
Review: I don't know what is yet, but I hope to find it myself too. We purchased this litterbox 18 months ago. We have two cats in the house. I spend almost as much time cleaning this device as i would manually sifting litter. The flimsy plastic rake often pushes litter (and worse) into little crevices within the device's drive rails. The recepticles are expensive and, if used correctly, throw litter directly at you when you attempt to remove them from their snap-locks. Often times, we will have to shut the machine off and move the litter into a "friendlier" place for the rake to catch it. Otherwise, the rake will run (loudly) until it can no longer move, then return to its start point (loudly) and begin again (loudly).
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