Sorry for the delayed response, had to go away on a business trip.
I store my seeds in an airtight container in a fridge. Seeds can last up to 10 years keeping them in the fridge in a dark container.
To maximize my germination success ratio and for difficult to germinate seeds i use “seed starter kit” with glass test tubes with Coco coir and my own hydrating solution. I bought the seed kit from www.microclone.com and it was one of the best investments I have made along with tissue culture cloning kit.
Here’s the hydrating solution formula 
Murashigy & Scoog nutrient media with Gamborg B5 vitamins. 4.43g makes one liter of 3600ppm solution. Dilute to less than 100ppm for germinating or 2 drops per 50mL of water. Very very effective!
Here’s a pic with one of my seeds that germinated inside the tube 
Here’s the tissue culture cloning 