How to Clean Guinea Pig Fleece Liners (Wash and Dry Settings)

Fleece liners have become a popular alternative to loose bedding in guinea pig cages. They are reusable, low in dust and soft underfoot, and urine soaks through the fleece into an absorbent layer below, so the top stays fairly dry. But they only work if you keep up with them. A liner that is not shaken out daily and washed often starts to smell, stops absorbing and ends up worse than shavings. This guide covers the daily spot clean, how often to swap liners, washing and drying settings, and when a liner is worn out.

It draws on guinea pig housing advice from the RSPCA and the liner care guide from GuineaDad, a fleece liner maker, both linked under further reading. Always check the care label on your own liner too. If your guinea pig seems unwell, or its droppings or urine change, see a vet who treats small pets.

How often to clean

The RSPCA advises spot cleaning guinea pig housing every day and a deep clean at least once a week, while not disturbing your pigs more than you need to. For fleece, that works out as:

Every day: sweep or vacuum droppings and hay off the liner, shake out the hidey pockets and swap the pee pads in the toilet corners.
Every few days to once a week: take the liner out and put a clean one in. Two or more guinea pigs, or a small cage, usually means more often.
When it smells or feels damp on top: change it straight away, whatever the schedule says.

Keep at least two full sets of liners so a clean one is always ready while the other is in the wash or drying.

The daily spot clean

Take out tunnels, hides and toys so you can reach every corner.
Brush droppings and loose hay into a dustpan, or use a small hand vacuum. Hay and hair cling to fleece, so a stiff brush or rubber broom helps.
Turn out any pockets or hidey sleeves. Guinea pigs like to hide in them, so this is where droppings collect.
Swap the absorbent pads in the corners where they toilet. Changing just those spots each day makes the whole liner last longer between washes.
Wipe the cage base under any damp patch, then put everything back.

Before you wash: get the debris off

Never put a liner covered in hay and droppings straight into the machine. It clogs the drain filter and leaves hair and hay on everything else you wash.

Fold the liner inward around the mess and shake it out outdoors, or over a bin.
Brush both sides with a stiff brush or a rubber glove to lift hay and hair.
A short tumble on no heat in the dryer, then cleaning the lint trap, pulls off a lot of the remaining hair.

How to wash fleece liners

These settings follow GuineaDad’s care guide in our own words. Other makers may differ, so their label comes first.

Turn pockets inside out so the water reaches the dirtiest part.
Fold so the absorbent layer is not shielded. If your liner has a waterproof backing, fold it so water can reach the fleece side.
Use cold or warm water, not hot. Too much heat can shrink fleece and spoil how well it absorbs and dries.
Use a free and clear (unscented) detergent at the dose on the bottle, not more. Leftover detergent can stop urine soaking through.
Skip fabric softener. GuineaDad suggests a splash of distilled white vinegar in the rinse instead, to soften and remove smell.
Pick a heavy soil or bedding cycle with an extra rinse and extra spin if your machine has them.
Wash liners on their own, not with your clothes or bedding.

Drying

Dry on low or no heat. Medium or high heat can damage fleece and make it shrink.
A common routine is a short low heat tumble, then hang the liner over a rack or line to finish.
If you dry outdoors, keep the liner out of strong direct sun, which can have the same effect as hot drying.
Make sure the liner is fully dry before it goes back in the cage.

Clean the machine afterwards

Hay and hair end up in the drum, door seal and filters. Wipe the drum and seal, empty the lint trap, and run an empty rinse now and then. See how to clean pet hair out of a washing machine and dryer.

When a liner stops working

Fleece liners last a long time with care, but not forever. Check each one after washing:

Urine pools on top instead of soaking through: try a wash with no detergent and an extra rinse to clear residue. If it still pools, replace it.
The liner smells even when clean: the absorbent layer is probably saturated for good.
Holes, loose threads or chewed edges: retire it. Loose threads can wrap around little feet.

What not to do

No scented detergent, fabric softener sheets or air fresheners. A clean liner is the way to control smell.
No hot wash or hot dryer cycle.
No strong cleaners on the cage base. Warm water and a mild, unscented washing up liquid is enough. Rinse and dry before the clean liner goes in.

For the rest of the cage, see how to clean a hamster, guinea pig or rabbit cage. Keeping a chinchilla or gerbil too? See how to clean a chinchilla or gerbil cage and dust bath.

Keep cleanup supplies ready

Our Pet Cleanup Kit is made for pet stains and odors on carpets and fabrics around the home, such as floor time accidents on a rug. Keep it, and every other cleaner, out of the cage itself.

Frequently asked questions

How often should I wash guinea pig fleece liners?

Spot clean every day and put a fresh liner in every few days to once a week, sooner if it smells or feels damp on top. Two sets of liners make this easy.

Can I wash fleece liners in hot water?

It is best not to. Hot washes and hot dryer cycles can shrink fleece and reduce how well it absorbs and dries. Use cold or warm water and low or no heat.

Why is urine pooling on top of my fleece liner?

Usually detergent or fabric softener residue, or a liner that has not been washed enough times when new. Try a wash without detergent and an extra rinse. If it still pools, the liner needs replacing.

Can I put fleece liners in the washing machine with my clothes?

Wash them on their own, after shaking and brushing off the hay and droppings, and clean the machine afterwards.