Falling asleep may have been an indication that they were working, they always give me a strong case of couchlock. Nodding to sleep would be the next phase.
I put PB on the cracker, make a small bowl in the PB with the tip of a knife, place the pot in the bowl then put a few drops of cooking oil on the pot. now stir the oil and pot together, then mix that into the PB. This method has never failed me if I eat them on an empty stomach.

Good luck and let us know how your experiments go.

Remember it's is all in the name of scientific discovery.