I my opinion only, I think that if you have a cat that stands close to edge of box you will have a problem with wee running over the edge which wouldn't be a big problem if the bottom waste tray didn't have a whole in it due to the way the drawer fits into and is secured. This means I could during the week transfer clumps and waste from the lower tray to the Litter Locker without having to make trips outside (no issue with odour as it is actually well designed) before then transferring the good remaining litter back to the top tray (as mentioned, in fairness to this litter box I probably had overfilled it - but equally sometimes the mechanism needs more of a jolt and so good litter could be lost; just an inherent limitation of the design. El mecanismo permite tener arena limpia en todo momento y gestionar los desperdicios sin manipularlos apenas. SmartSift includes a custom-fit biodegradable liner for the cat pan as well as one for the pull-out waste bin. The door system is also quite nice as my cat doesn't love being in an enclosed space for too long so we keep it open for her to stick her head out when she uses it.

Pull the lever: Practical and automatic: Once a day move the lever back and forth, so you will pass the sieve and separate the litter from the waste and compacted waste. Sure, the construction process is fairly straight forward; there aren't many parts, so it's not that difficult to figure it out. I had the impression it wouldn't be large enough for the cats to feel comfortable and be persuaded to use it.When cranking, the clumps of litter are supposed to funnel towards the middle, and then subsequently be deposited into the bottom tray when the gap between the swinging shelf and the face of the unit is large enough. This highly convenient litter sifting feature is noiseless as it doesn’t involve any motorized or electrical parts. By pulling the lever on the side of the litter box, your cat’s waste is efficiently removed and dropped into the pull-out waste bin below. We also found that the clumped litter adhered to the bag and required manually removing - which kind of defeats the purpose of the whole idea of the tray really.

The litter tray liners have a major design flaw - folded pockets that trap substantial amounts of the unused cat litter - when you tilt the tray these fall into the waste tray meaning that you lose loads of clean litter each time you pull the lever. empty the draw twice a week ( for the people who say their cat stands to wee, and it goes into the bottom drawer put some litter in the bottom drawer.Yes, clean litter does go in the bin, if you don't follow the instructions and put litter ABOVE the line that is clearly in there. Besides the easy-to-use lever system, the cat pan also includes a carbon pad that helps control odors.