FWIW:
http://www.vapco.com/prod_freezeitspray.html
Freez-It contains menthol, camphor, eucalyptus oil, and isopropyl alcohol.
Menthol, camphor, and eucalyptus oil are mostly harmless in small amounts, but have a strong odor. Same ingredients are in Vicks Vapo-Rub that Mom used to rub on your chest when you had a cold (oops, am I showing my age?).
Isopropyl alcohol, unlike ethyl alcohol (the drinking kind) is toxic if ingested or inhaled in sufficient amounts. If you get an unexplained headache that should be a warning sign.
Get enough folks using that indoors and it may get banned. Although I suppose the venue at Atlanta is large enough it might hardly be noticed?
CO2, by contrast, is relatively safe, except for the stored-energy concerns.
If you've got enough room around your CIM, try attaching an aluminum or copper heat sink with lots of surface area (fins).