Try the coconut water method i found it works great on old and hard to germ seed.
Boil 1Lt of water let it cool then add and mix in 20 mil of 100% organic coconut water.
Add some into a glass place the seed into that mix and let soak for 24 hours.
Then place into towel or what ever method you use to germ seed and use the mix to keep paper or fabric towel moist.
Seems even better if you can get a fresh coconut from the store and use that. The heat pasteurization even organic coco takes some of the oomph out. I can usually get my hand on a nut at the super. Going to be doing that with some old seeds I plan on sprouting in about two weeks just before full moon.