The basic emptying process takes about two minutes

The Litter Robot 4 empties into a sealed drawer beneath the unit. To empty it, you pull out the drawer, dump the waste into a trash bag, and slide the drawer back in. The machine will not cycle or function while the drawer is removed, so you can do this at any time without interrupting operation.

The drawer sits directly under the globe and catches all waste that falls through during the cleaning cycle. Because it is sealed, odor stays contained until you open it. Most owners empty once or twice a week depending on how many cats they have and how much litter they use.

Key Takeaways

  • Pull the drawer straight out from under the unit, empty the contents into a trash bag, and push it back in—no tools or special steps required.
  • The drawer is sealed, so odor does not escape into your home until you open it to empty.
  • You can empty the drawer at any time; the machine pauses automatically if the drawer is removed.
  • Wash the drawer with soap and water every few weeks to prevent odor buildup and keep the seal working properly.
  • If the drawer gets stuck or the machine stops cycling, check that the drawer is fully closed and seated in its tracks.

Step-by-step emptying instructions

Start by standing in front of the Litter Robot 4 and locating the drawer handle at the bottom center of the unit. Grip the handle firmly and pull straight toward you with steady pressure. The drawer will slide out smoothly on its tracks—do not yank or twist it, as this can damage the seal.

Once the drawer is fully extended, carefully lift it out and carry it to your trash can. Tilt the drawer and pour the waste into a trash bag or directly into the can. If clumps stick to the sides, tap the bottom of the drawer gently or use a small scoop to loosen them. Do not use sharp objects that could scratch the interior, as this can weaken the seal over time.

After emptying, slide the drawer back into the unit by aligning it with the tracks and pushing it straight in until you hear or feel it click into place. The drawer should sit flush with the unit—if it sticks out, pull it out again and reseat it. Once it is fully closed, the machine will resume normal operation if a cycle was interrupted.

Cleaning the drawer to prevent odor

The drawer itself can trap odor if waste residue builds up inside. Every two to three weeks, remove the drawer and rinse it with warm water and a small amount of dish soap. Use a soft cloth or sponge to wipe the interior and exterior, paying attention to the seal edges where moisture can collect.

Let the drawer air dry completely before reinserting it. If you notice a persistent smell even after cleaning, the seal may have a small tear or the rubber gasket may need replacement. Litter Robot sells replacement seals and drawers on their website if yours becomes damaged or worn.

What to do if the drawer is stuck or won't close

If the drawer does not slide out smoothly, check that nothing is blocking the tracks. Sometimes litter dust or a small clump can jam the mechanism. Gently wiggle the drawer side to side as you pull, and it should come free. Do not force it, as excessive pressure can bend the tracks.

If the drawer will not close all the way after you reinsert it, remove it again and inspect the seal and tracks for debris. Wipe both the drawer and the unit's interior with a dry cloth, then try reinserting. If it still does not seat properly, the seal may be misaligned—remove the drawer, check that the rubber gasket is centered, and try again.

How often to empty based on household size

A single cat household typically needs emptying once a week. Two cats usually need emptying twice a week. Three or more cats may require emptying every three to four days, depending on how much litter each cat uses and how often they use the box.

The machine will continue to cycle even if the drawer is full, but clumps may not fall cleanly into the drawer if it is overflowing. If you notice clumps sitting in the globe after a cycle, the drawer is probably full and needs emptying. Emptying before the drawer is completely full also keeps odor from building up and makes the job quicker.

Troubleshooting when the machine stops cycling

If the Litter Robot 4 stops cycling or shows an error light, the first thing to check is whether the drawer is fully closed. A drawer that is not seated all the way will trigger a safety stop. Pull the drawer out completely, inspect the tracks and seal for damage, and reseat it firmly until it clicks.

If the drawer is closed but the machine still will not cycle, unplug the unit for 30 seconds and plug it back in to reset it. If the problem continues, contact Litter Robot support—there may be an issue with the drawer sensor or the seal itself. Do not try to force the machine to cycle if the drawer is not closing properly, as this can damage the motor.

Frequently Asked Questions

Can I empty the drawer while the machine is in the middle of a cycle?

Yes. If you pull the drawer out during a cycle, the machine will pause automatically. You can empty the drawer and reinsert it, and the cycle will resume. This is safe and does not damage the unit.

What should I use to line the drawer?

You do not need to line the drawer. Most owners straightforward empty it directly into a trash bag or can. If you want to reduce mess, you can place a small trash bag inside the drawer before use, though this is optional and not required by the manufacturer.

How do I know if the seal is damaged?

A damaged seal usually shows as persistent odor even after cleaning, or the drawer may not close flush with the unit. You may also see visible cracks or tears in the rubber gasket around the drawer edges. Litter Robot sells replacement seals if yours needs replacing.

Is it normal for the drawer to smell after a few days?

Some odor is normal, especially in warm or humid climates. Emptying more frequently and cleaning the drawer every two weeks will reduce smell. If odor is very strong, check that the seal is intact and the drawer is closing completely.

What if litter gets stuck in the tracks?

Wipe the tracks with a dry cloth or soft brush to remove dust and debris. If clumps are stuck, use a plastic scraper or old credit card to gently dislodge them. Do not use metal tools, which can scratch the tracks and cause the drawer to stick.