Write the next sentence in the following story.

How to iron curtains
Wash the curtains.
Unwrap the curtains if they are still packaged. After that, you should wash your curtains on a cold water delicate cycle and then dry them with low heat or no heat on a gentle cycle.
Beyond removing residue from your curtains, washing will also make stubborn wrinkles less difficult. If your curtains are especially dirty, as might be the case if you're swapping in old curtains that have been in storage, you may want to wash them in warm water, but only if the label recommends doing so.