If a flag is torn, it can be repaired, preferably by a professional or someone skilled in mending. If it is dirty, it can be washed, preferably by hand with a mild soap. If it is faded or tattered beyond repair, or dirty beyond cleaning, then it is time to replace the flag.
Many veterans organizations hold special ceremonies to dispose of unserviceable flags or are collection points for unserviceable flags. Find out more about these ceremonies by the: