This can work great with dried flowers and wreaths as well.

You can use the compressed air to blow light coverings of dust and dirt off the flowers. However, you should avoid compressed air on very delicate silk flowers. It may cause petals to crumble.

This is very effective with very light layers of dust. Heavier dust or dirt may not respond as well to a hairdryer.

When you’re done, set your flowers on a towel. Allow them to air dry. Make sure to add water to a small portion of the flowers first to make sure it does not damage them.

If you’ve never exposed your flowers to water before, spritz a light amount of water on a small corner of the flowers to see if it causes damage first.

You should also keep in mind flower sprays may be more expensive than other methods.

As always, make sure your flowers respond well to water by adding a small amount to the flowers before washing them.

If some of the dust is stuck on, use a soft bristle brush instead of a regular duster and brush them flower by flower. Do this outside to prevent getting dirt and dust on your floor. [9] X Research source