The easiest thing to use to clean your silk flowers is a can of compresses gas duster. The very same one you use for your computer. Spray gently over the flowers.
2. Feather Duster
The next best thing is a feather duster. Just dust lightly to keep flowers clean.
Use a soft damp cloth to clean leaves and foliage.
If your flowers are really dirty from grime, hold them over a sink and spray Windex on them until they drip clean—just the way you might clean a chandelier. Shake to remove excess liquid and let dry at room temperature.