I use willow tree tea, get some willow tree twigs, 7 grams, 2 cups of water, boil for 5 minutes, turn off heat, let it cool to 112F, pour 4 or 5 ounces into a small container that has the old seeds in it that you want germinate, then put that on a heating pad for 24 hours, a cable box also works. Then put the seeds into a paper towel, using the willow tea water they were soaking in, into a zip lock bag, but don seal it, then return the zip lock bag to the heating pad or cable box until they crack. I get the best germinating rates for older seeds that way. I have had 40 year old seeds stored in old 35mm aluminum film cases stored in a root / canning cellar, pop in the low 30% ratio!
