Here's what you shoud know about taking care of your new flag!
1. Protect your flag from exposure to storms, snow or abnormally high winds, as these adverse conditions can shorten its life. If your flag should become wet, let it dry completely by spreading it out. Never roll or fold your flag when it is wet or damp as this can also damage the fabric.
2. Clean your flag regularly to keep the fabric looking new. Your flag can be hand-washed with warm water and mild soap, then thoroughly rinsed and spread out to air dry. Do not let the flag stand in the wash water for extended periods of time or some color transfer may occur from the red stripes to the white stripes.
3. Determining where to hang your flag is also important. Do not fly the flag where it will come in contact with tree limbs, buildings or cables. When the flag is flying, hitting such an object could cause a tear in the material. Even a small tear could result in the flag becoming tattered. Inspecting your flag for any small tears or signs of wear can prevent a small problem from becoming a big problem. If you notice a tear or wear at the end of the flag, trim and re-hem the end, and your flag will be ready to fly again.
Via Capitol Flags