“It says that if you take ash” What kind of ash? How much? What’s the source?
“ground to fine soot” How finely is it grounded?
“an sprinkle it around your bed” Where? On the comforter? On the floor? Sprinkle it clockwise? counterclockwise?
“before you go to sleep” Before midnight? How long do you have to sleep?
“you will see rooster footprints in the morning”, Perhaps, if we know what to look for.
“which is what Sheidim feet look like.”
I agree wholeheartedly with Chazal. But as you can see, if we don’t know exactly what we are doing, we may not get the results we are looking for.
Just my humble thoughts on the subject.