Southwestern Connecticut residents had to break out their ice picks before digging out their cars from the remnants of the first winter storm of 2007.Only two inches of snow accumulated on the ground, but bigger problems were caused by freezing rain and ice. Meteorologists say a combination of dry air and frigid temperatures caused the storm to leave behind more ice than snow. Experts advise residents against using ice-melt, hot water or sand on cars. They suggest traditional ice scrapers and some calcium chloride. If cars are frozen shut, a spray-on defroster for locks is available at most hardware or supply stores. Workers at Karps Commercial Supply in Stamford says the store was filled with bags of calcium chloride before the storm, but by the close of business they were completely sold out.