Refreshing a millipede enclosure usually means surface cleaning and topping up, not stripping the habitat out and starting again. In most cases, buried millipedes are best left undisturbed while you remove waste, replace spent leaf litter and check that the enclosure still has a stable, moist lower layer.
That matters because millipedes live much of their lives below the surface. They burrow to rest, feed and, for many species, moult safely. If an animal is buried, it may be behaving completely normally, so the safest refresh is usually the one that leaves the deeper substrate alone.
If you are planning a larger substrate update, our Millipede Enclosure & Substrate Guide covers the basics of building a habitat that works like a woodland floor.
Why a millipede enclosure should be treated like a woodland floor
A millipede enclosure works best when it behaves more like a woodland floor than a display tank. The substrate is not just bedding; it is shelter, feeding ground and part of the enclosure's long-term stability. Leaf litter, decomposing leaves and rotting wood all help create a usable, living layer that millipedes can burrow into and feed from over time.
For refreshing, that means function matters more than appearance. A tidy surface is not useful if it means exposing buried animals or breaking up the damp lower layers that keep the enclosure stable.
- deep substrate with room for burrowing
- stable moisture below the surface without waterlogging
- leaf litter and other decaying organic matter
- minimal disturbance to buried animals
- a habitat that is left time to mature
Everyday care
Routine refreshing is usually simple. Remove obvious waste, mouldy food and any dried leftovers from the surface, then top up the leaf litter so the enclosure keeps its natural cover and breaks down material gradually.
If hides or bark are resting on the surface, lift them gently and only check what is already exposed. Do not dig beneath them unless you can clearly see that the area is empty. If a millipede is underneath or just below the surface, put the hide back and leave the animal alone.
Check moisture by looking and feeling only the accessible layers. If the top layer looks dry but the substrate below still feels damp and earthy, adding more leaf litter is often enough. If moisture needs attention deeper down, deal with it carefully rather than turning the whole enclosure over.
How to refresh without disturbing buried animals
- Look over the enclosure first and note any visible activity or buried animals.
- Remove only surface waste, spoiled food and dry debris.
- Top up leaf litter and other accessible organic material.
- Replace hides gently without lifting deeper substrate.
- Leave the lower layers alone unless there is a clear husbandry reason to intervene.
This approach keeps disruption low while still improving the enclosure. It is especially useful in established setups where the substrate is already working as a living system.
For deeper changes, it may be better to move the millipede to a new enclosure rather than keep disturbing the old one. Our guide on How to Move a Millipede to a New Enclosure explains the transfer process.
What to refresh, and what to leave alone
Surface leaf litter is the easiest material to refresh. It breaks down over time, protects humidity and gives the enclosure a more natural structure, so replacing a portion of it during routine care is usually sensible.
Uneaten fruit or vegetables should also be removed before they spoil. Once the waste is gone, restore the surface with dry leaf litter so the area settles back into a stable, natural state.
Deeper substrate should generally be left alone if it still smells earthy, feels damp without being soggy and supports burrowing. Good substrate often improves with age as leaves and wood break down.
Rotting wood and embedded organic matter are part of that long-term function too. Unless material has gone bad, become contaminated or collapsed in a way that affects the enclosure, it is usually better to leave it in place.
Common mistakes
The biggest mistake is digging just to check. Buried millipedes are often exactly where they should be, and repeated digging can disturb moulting animals and damage the stable layers that make the enclosure work.
Another mistake is replacing too much at once. If every maintenance session strips out leaf litter and turns over the substrate, the habitat never has a chance to settle.
It also helps not to confuse tidy with healthy. A thin, clean-looking surface is not necessarily better than a deeper enclosure with plenty of leaf litter and stable lower layers.
Building a better routine
Keep maintenance calm, regular and low disturbance. Small top-ups and spot cleaning are often enough between deeper substrate changes. When the enclosure smells earthy, stays damp below the surface and still supports burrowing, the best option is usually to preserve that structure rather than reset it.
For more background on setting up a substrate that supports this kind of maintenance, see our Millipede Enclosure & Substrate Guide.
In short, refresh the surface, protect the lower layers and leave buried millipedes alone unless there is a clear reason to intervene.
