I have started warming 1/4 cup of water (or less) and
dissolving the Epsom Salts in this. I can usually get
this down in 1 or 2 gulps. I then drink some cold water
to get rid of the horrible taste.
I've flushed a couple times without the salts and thought
it was pretty uncomfortable. I really don't recommend it.
Frankly, I only fast for a few hours. It works better
if I do no fats for 24 hours. I've cheated a bit on the
fats and still get stones out. Just not as many.