I started Clark's protocol 3 years ago and went by the book the the first couple of times, then started changing it .... constantly. Timing, oil type (and what I mix with it with it), pushing fluids up to an hour of the 1st ES dose, subbing SWF (Salt-Water-Flush)
for the the next day ES doses. Sleep, don't sleep ... doesn't matter. Lie on your back, lie on your right side. Just keep still for the first 30 minutes after the oil.
Read a lot of the past posts. Lot of variations out there (mine alone)