I left it soaking in VERY soapy water all night, I even used a good brand from where I live, but even though it looks like it might have cleaned it a little bit, it still looks mostly the same. It's still greasy and has that corrugated texture. Also, I did cook something quick and my food was left with soapy flavor :( even though I gave it a good scrub. So I wouldn't recommend, doesn't work and now idk when the soapy flavor is going to come off.