Clean your Litter Robot 4 weekly and do a deep clean monthly to keep it working properly and prevent odor
The Litter Robot 4 needs two types of cleaning: a quick weekly maintenance that takes about five minutes, and a deeper monthly clean that takes 15 to 20 minutes. The weekly routine prevents litter buildup and keeps the sensor working. The monthly clean addresses the parts that trap moisture and odor over time. Both are straightforward if you follow the steps in order and don't skip the drying time.
The machine will alert you when the waste drawer is full, but that is different from the cleaning schedule. You can empty the drawer without cleaning the unit itself. However, if you notice clumping around the edges, a smell that litter spray does not cover, or the unit cycling slowly, those are signs you need to clean sooner than a week.
Key Takeaways
- Weekly cleaning means emptying the waste drawer, wiping the bonnet (the dome-shaped top), and checking the sensor lens for litter dust.
- Monthly deep cleaning requires removing the bonnet and globe, washing both with warm soapy water, and drying them completely before reassembly.
- The sensor lens must stay clear or the unit will not cycle properly; wipe it with a dry microfiber cloth every week.
- Never use a pressure washer, bleach, or abrasive scrubbers on any part of the Litter Robot, as these damage the plastic and electronics.
- Always unplug the unit before you start any cleaning, and let all parts air-dry fully before plugging it back in.
Weekly cleaning: the five-minute routine
Start by unplugging the Litter Robot 4 from the wall outlet. This is not optional—it prevents accidental cycling while your hands are near moving parts. Wait 30 seconds for the motor to stop completely.
Empty the waste drawer by pulling it straight out from the front of the unit. Dispose of the contents in your trash. Rinse the drawer with warm water if it has stuck litter or moisture, then dry it with a cloth and slide it back in until it clicks.
Next, wipe the bonnet (the curved plastic dome on top) with a dry cloth or paper towel. Litter dust and tracking settle here. Pay attention to the seams where the bonnet meets the globe—litter collects in those grooves. A dry cloth is enough; you do not need water for the weekly clean.
Finally, locate the sensor lens on the inside of the bonnet. It is a small dark circle. Use a dry microfiber cloth to wipe it gently. Do not press hard or use a wet cloth. If the lens is dusty, the unit will not detect when the globe is full and will not cycle. Plug the unit back in and run a test cycle by pressing the cycle button on the app or the unit itself.
Monthly deep clean: removing and washing the bonnet and globe
Unplug the unit and wait 30 seconds. Lift the bonnet straight up and off the globe. It will come free with a gentle, steady pull—do not twist it. Set it aside on a clean surface.
The globe (the large clear or translucent bowl) stays in place for now. Look inside at the bottom. You will see a rubber gasket (a seal ring) and the motor shaft. Do not remove these. Instead, use a damp cloth to wipe the inside walls of the globe, focusing on the seams and the bottom where moisture and litter dust accumulate. Wipe the outside of the globe as well. If there is stubborn buildup, let warm water sit on it for two minutes, then wipe again.
Now wash the bonnet. Hold it under warm running water and use a soft cloth or soft-bristled brush to clean all surfaces, including the underside and the seams. Pay special attention to the sensor lens area—wipe it gently with a cloth under running water, then dry it completely with a microfiber cloth. Do not soak the bonnet or submerge the sensor. Shake off excess water and set it on a clean towel to air-dry for at least 30 minutes.
Once the bonnet is dry, place it back on the globe by aligning the tabs on the bonnet with the slots on the globe. Push down gently until you hear a click. Plug the unit back in and run a test cycle.
Cleaning the sensor lens when the unit stops cycling
If your Litter Robot 4 cycles very slowly, stops mid-cycle, or does not cycle at all, the sensor lens is usually the culprit. Unplug the unit when ready. Lift the bonnet off and look at the lens on the underside. If it is visibly dusty or has a white film, that is the problem.
Use a dry microfiber cloth first. Wipe the lens gently in circular motions. If that does not work, dampen the cloth slightly with distilled water (not tap water, which can leave mineral deposits) and wipe again. Dry it completely with a dry cloth. Do not use rubbing alcohol, vinegar, or any cleaning solution—these can damage the sensor coating.
Plug the unit back in and run a test cycle. The globe should rotate smoothly. If it still moves slowly or stops, the sensor may need replacement, which requires contacting Litter Robot support.
What to avoid when cleaning
Never use a pressure washer, even on low setting. The force will damage the plastic and force water into the motor and electronics. Do not use bleach, vinegar, or harsh chemical cleaners—they degrade the plastic and can leave residue that your cat ingests when grooming. Avoid abrasive scrubbers, steel wool, or scouring pads, which scratch the globe and bonnet.
Do not submerge the bonnet for long periods or pour water directly into the sensor area. Do not remove the rubber gasket at the bottom of the globe or the motor shaft—these are not user-serviceable parts. If either is damaged, the unit will not work and will need professional repair.
Never plug the unit back in until all parts are completely dry. Water left inside can short the electronics. If you accidentally get water in the motor area, leave the unit unplugged and open for 24 hours before trying again.
Dealing with stubborn odor and mineral buildup
If your Litter Robot smells even after weekly cleaning, the issue is usually moisture trapped in the globe seams or a litter type that does not clump well. Switch to a clumping litter designed for automatic boxes—non-clumping litter leaves dust and moisture behind.
For mineral buildup from hard water, soak the globe and bonnet in warm distilled water for 10 minutes, then scrub gently with a soft cloth. Rinse thoroughly with distilled water and dry completely. Do this once a month if you have hard water.
If odor persists after cleaning and a litter change, check that the waste drawer is sealing properly. A loose drawer lets odor escape into the room. Make sure it clicks all the way in when you slide it back.
Replacing parts that wear out
The bonnet and globe are the parts most likely to need replacement after years of use. The bonnet may crack if dropped, and the globe can become cloudy or scratched, making it hard to see inside. Litter Robot sells replacement bonnets and globes on their website. Installation takes two minutes—just lift off the old part and press the new one on until it clicks.
The rubber gasket at the bottom of the globe can harden or crack over time, causing litter to fall through gaps. If you notice litter leaking from the bottom seam, the gasket needs replacement. This requires removing the globe, which is more involved—contact Litter Robot support for instructions or a replacement unit.
Frequently Asked Questions
Can I use vinegar or baking soda to clean the Litter Robot?
No. Vinegar can damage the plastic and leave a smell that attracts cats to the wrong spots. Baking soda is abrasive and can scratch the globe. Stick to warm water and a soft cloth. If you need extra cleaning power, use a small amount of unscented dish soap mixed with water, then rinse thoroughly and dry completely.
How often should I replace the bonnet and globe?
With weekly cleaning and proper maintenance, the bonnet and globe last three to five years. Replace them sooner if the plastic cracks, the globe becomes too cloudy to see through, or the bonnet no longer seals tightly to the globe. Replacement parts are available from Litter Robot's website.
What if water gets inside the motor or electronics?
Unplug the unit when ready and do not plug it back in. Leave the bonnet off and the unit open in a dry room for 24 hours to allow all moisture to evaporate. After 24 hours, plug it in and run a test cycle. If it does not work, contact Litter Robot support—water damage may require professional repair or replacement.
Why does my Litter Robot smell bad even after cleaning?
The most common cause is litter type. Non-clumping litter leaves dust and moisture that create odor. Switch to a clumping litter designed for automatic boxes. The second cause is a loose waste drawer—make sure it clicks all the way in. Third, check that you are cleaning the seams and bottom of the globe where moisture hides. If all three are addressed and odor remains, the rubber gasket may be worn and need replacement.
Can I clean the Litter Robot while it is plugged in?
No. Always unplug it first. Cleaning while plugged in risks accidental cycling, which can injure your hand or damage the unit. Unplugging takes two seconds and is the safest approach.