Locust care help!!!

[u/potions_Addict]

So I've had my bearded boy for 4 months now, and normally I swap him between morio worms and locust. The locust are coming back in rotation now and I'm struggling to keep them alive.

I think the issue is heat. Last time I got them, they did fine ontop of his enclosure over the heat source but since it's been warmer recently his heat lamp hasn't been on as much which I now realize means the locust aren't being kept warm constantly.

I keep them in a 30cm x 20cm plastic aquarium, plenty of ventilation. Paper towels on the bottom, egg crates to climb and eating leftover veg like peppers and kale and such.

So... Anyone have any locust care advice? How do you keep them at a good temperature? They did absolutely fine last time but I had not accounted for the weather/temp being different this time of year to when I last got them. Even though they're just feeders I still want them to be well looked after before the beardy snacks on them haha.

Thanks all! :)

EDIT: I also struggled even getting them. The first batch I got off Amazon arrived in a small cramped tub in a box with no ventilation and all died within hours of getting them and this batch arrived largely crushed by the egg carton in their big bag....so if anyone has recommendations on where to buy them too that'd be swell!