I use gift ribbons over. To press them flat again, as they have tie wrinkles, I use a curling iron. This is usually the right heat and I can slide the ribbon along and it presses.
Uses for Old Garden Hose
Pleated Ribbon Brooch
Reusing Glass Jars
Hair Flat Iron for Wrinkled Ribbon
Craft Ideas Using Ribbon
Recycled Wrapping Paper Ideas