Hi folks

I'm a bit unsure about the process of removal of these creatures.

Samael provides the following method:

"An efficacious remedy in order to liberate oneself from these larvae is to carry sulfur powder inside of our shoes."

But isn't Sulfur poisonous? How can I carry it in my shoes?
What amount is sufficient?
And does it have to be in a breathable bag or can be sealed plastic?
Does it have to come in contact with the foot in any way?
And where in the shoe should I put it?

Thanks