To dissolve dry ice, place it in a container of warm water. The warmer the water, the faster the dry ice will dissolve. Stirring or agitating the mixture can also help speed up the process. Once all of the dry ice has dissolved, be sure to dispose of any remaining liquid properly, as it may contain carbon dioxide gas which is hazardous if inhaled. Additionally, always wear protective gloves and eye protection when handling dry ice. Again, do not do this in an area that is closed off. Go outside. People have died from breathing in dry ice fumes because of a lack of ventilation when added to water.