If you’ve ever spilled a glass of water on a silk nightie, you know how hard it can be to remove the stain. Water stains can cause permanent damage to delicate fabrics like silk, but that doesn’t mean that all hope is lost. With the right methods and materials, you can restore your favorite silk nighties back to their original condition. The first step in removing a water stain from silk is to use lukewarm water and a mild detergent to dampen the stained area. Gently rub the fabric together until it feels soft and clean. If this doesn’t work, try using white vinegar or lemon juice mixed with warm water for extra cleaning power. Apply the mixture directly onto the stained area and leave for several minutes before rinsing off with cool water. This should help lift any stubborn stains from your fabric.