I was sorting through my seed collection from 2004 until now, and came across a pack of Taiyo Sunflower seeds from 2004. I wasn't sure if they would sprout, so I placed them in warm water in a coffee mug with a small saucer underneath, and placed it on an electric mug warmer on LOW (not High), and in two days , 4 out of the 6 seeds have sprouted....

The warmer works great for checking to see if old seeds will sprout. I Love it, using it for all of my seeds now..

Quicker than the paper towel/baggie method.