I know if the seed wont crack after 24 hours you can trow them away .
next time try with distilled water and paper towel .you place like 3 layers of paper and pur distilled water on it (not to much but that will make the area wet ) place the seed inside and close it.
after 24 hours in a dark place you have a cracked seed .its like the seed moister itself from the paper ,importent to let the seed be moist all the time and not squashed .
like