Martha Stewart Living, October Fall 2000
First, make a basic curtain out of thin cotton: Measure your window, adding 2 inches to the height. Cut fabric to measurements; fold over top 2 inches and sew to create a curtain-rod sleeve.
Twist a section of the fabric tightly, and hold in one hand. With the other hand, use scissors (preferably slightly dull) to take tiny snips out of the balled-up fabric (be sure not to cut the sleeve or your hand). Repeat this over different sections until the entire curtain has uneven snips, slashes, and holes; cut chunks and slices out for variation.
Next, wash and dry the curtain, removing it from the drier before completely dry. The curtain will be knotted up, so this is a good time to make more tears and slices if desired.
Brew a strong pot of tea (four tea bags per 2 cups of water) and when cool, pour into a spray bottle.
Flatten out the curtain, and clip to a clothesline; spray tea at top so it drips down, giving the curtain an eerily neglected appearance, as if the rod has rusted and stained the curtain.