Rosin build up on violin strings can make them sound scratchy. Although applying rosin to the bow is important to create friction when the bow is pulled across the strings, too much rosin on the strings can reduce the strings ability to vibrate. Clean the rosin off your strings regularly to reduce any scratchy sounds.
ICE means Immigration and Customs Enforcement. ICE is the immigration police for the federal government and is responsible for enforcing immigration laws.
After you are arrested, the police may decide to contact ICE if they believe that you are an undocumented immigrant, or ICE may contact the police if they want to interview you regarding your immigration status. This most often happens when jails input detainee information into databases shared with ICE.