(Last Updated On: July 30, 2021)

Every pet owner will say that they enjoy spending time with their pets. But that the smell from the litter box is not something they love. While it’s natural for body waste to smell, it’s not pleasant. Both cat poo and urine can stink and the two combined can bring out a nasty pungent smell.

But, why does your litter robot 3 smell so bad? It’s not always because your kitty has used it several times, but due to several reasons which include your cat’s natural diet.

Let’s dive in deeper and learn why your litter robot smells and why you need a litter robot filler that does the job.

Comparing Litter Genie

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Why Your Litter Robot Smells

An indoor cat provides wonderful company, awesome cuddling moments, and a lot of playtime. But there’s a serious downside, a smelly litter box. Compared to other domestic animals like dogs, a cat’s urine is more concentrated.


A cat also uses a litter box more often and the accumulated poo and urine usually leave a strong ammonia smell. This is quite normal though very strong odors might signal an underlying problem like a urinary tract infection and you’ll need to consult your vet. Here are five reasons why your litter robot smells.

Carbon filter and base seal strips not replaced

Some litter robots are smelly which might be due to how frequently your cat uses them or how often they are cleaned. Your cat’s litter robot filter contains odors within the drawer but it needs to be replaced every once in a while, especially if it’s smelly.

The base seal strips are located at the bottom of the robot where the drawer is placed. They function as sealants preventing the odor from leaking. When the base seal strips wear out or start leaking, they lose their sealing properties allowing odor to sip to the outside. Check and replace them at least once a year.

Improper cleaning of the drawer

The litter robot drawer needs to be thoroughly cleaned for it to be odor-free. You can’t just splash some water and assume that it’s clean. Wash the waste drawer at least once a month if you have a single cat or twice for 2-3 cats.

Use a soft detergent and soft brush when cleaning the inside part. Then rinse it thoroughly using water before drying both the inside and outside with a soft cloth or paper towel. Finally, dip the waste drawer in a container containing water mixed with a few drops of chlorine for around 5 minutes to disinfect it before wiping it dry. 

Cleaning rate

How often you clean your litter robot plays a huge part in whether it will smell or not. But, the frequency is also dependent on its use. For a single cat, you can clean the root once a month. If you have 2-3 cats using the same robot, you need to clean it at least once every 2 weeks. This is the same for a male that splashes high when urinating. If not cleaned often, the smells get absorbed into the litter box and accumulate to a point that you can’t get rid of them.

Wrong litter

The type of litter lining the box is very important since litter works by absorbing urine and odors. This allows cats to cover their feces to prevent the growth of bacteria that emit odor. Litter has 3 main ingredients, clay, and silica or plant materials. It doesn’t matter the type you use, but emptying it once a day will reduce odor. Also, ensure that you have an adequate depth of litter for your cat to cover her waste (2 inches).


Medical condition or poor diet

In some cases, none of the above reasons might be the issue and you will have to check your cat’s diet and nutrition. Cat waste is smelly but not excessively smelly. Switch your cat’s diet and increase how much water they drink to see if there’ll be any changes. In addition, you can also consult a vet to determine if there might be urinary or digestive issues.

The Litter Robot Filter

If you’d love to stay within an environment that isn’t always smelly due to cat litter, the Litter-Robot 3 filter is one of the many efficient filters available. It’s efficient when it comes to odor control. You can easily remove, clean and replace Litter robot 3 when cleaning the drawer.

Check out Litter Robot Carbon Filters.

To eliminate any chances of odor absorption, it’s best to change the carbon filter often, at least every three months, especially if around 2-3 cats are using the unit. A complete replacement of the filter depends on how often your cat uses it.

One advantage of Litter-Robot 3 is that it comes equipped with a carbon filter in the waste drawer. You can also buy 3.5” x 10” Litter Robot 3 Open Air Carbon Filters separately which are effective at reducing unpleasant odors thus maintaining a fresh drawer. These filters are all compatible with Litter-Robot III Open Air. While the carbon filter isn’t necessary for the litter box to function, its ability to absorb odors makes it an important tool. 

It’s always best to go for an unscented filter. However, if you prefer scented litter, it’s best to change the filter more often, since the scent is usually absorbed by the filter. 

According to reviews from previous clients, the Litter robot filters are a must-have to maintain freshness throughout the day. Their effectiveness makes them worth every coin you spend.


Being aware of your cat’s litter odor and what might be causing it will help you to stay informed on how to prevent it and find out more about your kitty’s urinary and digestive health. By monitoring and knowing why your litter robot smells, you will be maintaining a clean and fresh environment as well as ensuring that your cat’s well-being is a top priority. Ensure that you keep your litter box clean and fresh to make your cat feel more comfortable.