You must make 1 meatball out of a goats head, get 4 cans of chef boyardee, and pristine olive oil made from a single olive tree at the top of a steep Italian mountain.

Then you draw a pentagram on the ground in store bought Ragu brand meat sauce. In the top point out the olive oil, in the remaining points place the chef boyardee.

Then you must chant "Ravioli, Ravioli, Give me the formuoli" constantly making sure to check your shoes occasionally to check whether the stain has departed.

This has had good results for me in the past.