Wed Oct 24, 2012 12:47 pm by rai
dry ice is not made of water, its made of CO2 that stuff you breath out after using the oxygen you breath in.
CO 2 has no liquid state at normal temperatures, it sublimates to invisible gas, perhaps that fake steam that is seen in stage shows is actually condensation of moisture in the air caused by cold gas, like the contrails that appear behind a high flying airplane are made of condensation from friction heat and engine heat as the plane passes through the cold air.
The nearest thing I can think of that could cause a malfunction of an electronic lock would be what alarm technicians used to call a "swinger", that is a broken circuit that comes and goes due to heat expansion or contraction, or swelling of wood in damp conditions. these were hard to find because the false alarms were caused at night and the tech comes out during the day to look for it and its already autorepaired, so his continuity tester indicates a good circuit. Very common condition on the old foil tape window sensors.