Don’t Overload the Machine
Your jeans need breathing room. If they are packed in tightly with too many other clothes, they’re more likely to emerge looking warped.
Reshape Jeans Before Drying
If your jeans already appear wrinkly fresh out of the wash, don’t just throw them in the dryer. First lay them flat and smooth out any bunching by hand. If you air-dry, hang them by the waistband so they don’t get wonky creases.
Don’t Overdo the Fabric Softener
Fabric softener can make clothes feel good, but it applies a coating to Lycra fibers that makes them lose their stretch as they age. Using too much will actually do more harm than good.
source: Reddit
How to Restore Jeans That Already Rippled or Wrinkled After Washing
So what if the harm is already done? Don’t panic — there are steps you can take to smooth things out.
Steam the Fabric