How good is Eradicoat please? I'm not sure exactly what it is, but I guess it's a good way of catching minor infestations organically.
My minimum temp in the conservatory is about 18-19oC which does mean the predators are more or less warm enough. They definitely are in the daytime! (temps can get up to 40oC, though only when Sir forgets to open the inner door...)
Wish I knew why the previous owners went for a conservatory with no small windows. The only ones we can open are large enough to let someone get in (assuming they don't mind climbing through a cucumber and a dozen chillies!) and with them shut for security, ventilation is dreadful. Still, humidity gets pretty high (which the plants and predators love).
moonbells