Cooling crested gecko enclosure after heat stress

Heat stress in crested geckos is serious — they're a cool-temperature species and don't tolerate sustained warmth above 80°F at all well. The fact your vet caught this is good, but now you need to actually control and monitor that enclosure temperature reliably rather than guessing. To point you in the right direction: how old is your gecko, what's the enclosure currently like, and do you have any thermometer or heating equipment in there at the moment?

That dial thermometer is almost certainly giving you inaccurate readings — they measure the glass surface, not the air your gecko is actually living in, and they're notoriously slow and imprecise. That's a really common reason people don't realise temperatures are creeping up. The heat mat on the side of a tall enclosure like that can also create a warm spot that builds without adequate airflow. What's the ambient room temperature typically, both day and night?

Honestly, 20–21°C daytime is perfect for a crested gecko — they thrive between 20 and 25°C and genuinely don't need supplemental heating at those ambient temperatures. At 16–17°C overnight that's a little cool but manageable for a healthy adult; crested geckos tolerate brief dips to around 16°C without harm. The heat mat was solving a problem that didn't really exist, and in doing so created a worse one. What you need right now is accurate, real-time temperature data so you can see exactly what's happening in the enclosure — and the tool for that is a digital thermometer with a remote probe you can place at gecko level inside the enclosure.

Yes — the Inkbird IBS-TH2 digital thermometer with Bluetooth and a remote probe is what I'd go with. It's accurate to within 0.3°C, logs temperature and humidity continuously, and connects to a free app on your phone so you can check readings anytime and set alerts if temperature goes outside your target range. For your enclosure that means you'll instantly know if the room is getting dangerously warm in summer or dropping too low in a cold snap. Place the probe at mid-height where your gecko spends most of her time. It's under £20 on Amazon UK and the data it gives you is genuinely what was missing here. Remove the heat mat entirely for now — if winter nights are consistently hitting 15°C or below, come back and we can talk about a low-wattage ceramic emitter on a thermostat, but you're not there yet.

Two things worth reviewing: humidity and UVB. Crested geckos need 60–80% humidity — mist the enclosure once or twice daily and let it partially dry out between sessions to avoid bacterial growth. And while they're often kept without UVB, low-level UVB lighting (a 2.0 or 5.0 tube on a 12-hour cycle) does benefit their long-term health and vitamin D3 metabolism. But temperature is your immediate priority post-diagnosis. Get the Inkbird in, remove the heat mat, and monitor for a week — your vet will likely want to see she's stabilised before her follow-up anyway.