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.
Recycled Wrapping Paper Ideas
Uses for Old Garden Hose
Craft Ideas Using Ribbon
Hair Flat Iron for Wrinkled Ribbon
Reusing Glass Jars
Pleated Ribbon Brooch