Clean burnt pot with coffee grounds

After I used to boil all the stuffed and burned with salt, I realized a few days ago that it works wonderfully with coffee grounds! In any case, with metal dishes. I have not tried it with cast iron, I do not have Teflon.

So here's my ultimate first-time tip:

Let burnt pan / pot cool, add coffee grounds.
Soak overnight.
For example, Scrape off with a wooden scraper or simply wash with a dish brush under water, then rinse normally.

Advantage: easy, without scrubbing, without chemicals, fat absorbing, binds odors, can then on the compost and does not pollute our waters with fat.

Maybe you can do without cooling down, but I have not tried it yet.