Cleaning a flocked Christmas tree can be a bit of a challenge, but with the right approach, it's not impossible. First, make sure to remove any ornaments or decorations from the tree. Then, using a soft-bristled brush or vacuum with a soft attachment, gently dust the tree to remove any loose dust or debris. To remove any more stubborn dirt or stains, you can use a damp cloth or sponge with a mild soap or cleaning solution. Be sure to work in small sections and avoid soaking the tree in water. Once the tree is clean, allow it to air dry completely before decorating it again.