Giving warped denim a once-over with a clothes steamer works wonders. If you don’t, hanging them in a steamy bathroom for a few minutes can loosen the fibers.
Use an Iron with a Damp Cloth
Dampen a cloth and place it over the rippled areas, pressing with an iron on a low setting. It helps loosen the Lycra and the iron smooths out any wrinkles.
Stretch the Fabric by Hand
Sometimes it takes a bit of pulling. Lay the jeans out flat and lightly pull on the puckered spots to spring them back into shape. This is most effective while they are still wet.
Rewash Cold Water Gently Dry
If all else fails, washing them again — correctly this time — can sometimes help reset the fabric before the damage becomes permanent.
