You cleaned the enclosure; your skink moved house
From a skink's point of view, a full enclosure clean is not housekeeping — it is a relocation. Skinks navigate largely by smell, and their burrows, basking spot and favourite corner all carry a familiar scent map built up over weeks. Strip out the substrate, scrub the furniture and put everything back in slightly different places, and the enclosure your skink returns to smells and reads like unknown territory. A burrowing species answers unknown territory the way it answers danger in the wild: it goes underground and stays there until the world above proves itself safe again. Days of hiding after a deep clean is therefore a stress response with a clear cause, not sulking and not illness in itself.
Why some cleans hit harder than others
The bigger the reset, the longer the burrow. Replacing all the substrate at once removes the entire scent map in one blow, while strong-smelling cleaning products leave chemical traces that are presumably even more alien to an animal that tastes the air. Moving the hide to the opposite end, swapping decor around, or cleaning while the skink watches from a bare holding tub all deepen the sense that nothing is where it should be. Skinks that are naturally shy, newly arrived, or approaching a shed are the ones that vanish longest, because their confidence was already running low before the clean stripped away what familiarity they had.
Cleaning in a way that keeps the map intact
The single most effective change is to stop replacing everything at once. Spot-clean waste daily, and when a deeper clean is due, change part of the substrate rather than the whole floor — mixing a portion of the old, clean-smelling substrate back in keeps the scent map partly readable. Return every hide, log and stone to exactly its old position, and use plain hot water or a reptile-safe cleaner rinsed thoroughly so no perfume lingers. Clean the fittings in rotation — the water bowl and one hide this week, the rest next week — instead of stripping the whole enclosure bare in one session. Afterwards, offer a favourite food item near the burrow entrance in the evening; appetite returning is usually the first sign the skink has decided the renovated home is safe.
When the hiding is something else
A skink that burrows after a gentle partial clean but reappears to bask and eat within a day or two is behaving normally. One that stays buried for a week or more, refuses food it would normally take, or emerges looking duller, thinner or with shed skin stuck around the toes needs a closer look — check first that the clean did not accidentally change the temperatures, since a basking lamp refitted at a new distance can quietly wreck the gradient. If the setup is right and the hiding persists, a reptile vet should rule out illness. Writing your exact cleaning routine into KinsLe's Care Pass means a sitter looking after your skink while you are away keeps to the same partial-clean pattern, instead of helpfully deep-cleaning the enclosure and resetting the stress all over again.