Hi Everybody!

We did our first run with dry ice yesterday, but we found ourself against a serius problem.
The CPU idle temperature could not fall under -25 °C .The ice temperature was about -60°C.

The container was made of brass ( not copper) .Can it cause the problem?
Or can can be the rise of the problem that the thick of the support is only 4mm?
We used alcohol too , but we didn't know the quantity .

Can anybody help plz?

Thanks.