When you put your seeds in a jar overnight to see which ones are good, do you keep the ones that float or sink?
My experience is that they both germinate, sinkers seem to germ faster that floaters. The floaters that I had in my last batch of seeds, I just simply pushed them under with my finger after a few days floating in the glass of water. They did germinate but where like a week behind the sinkers. remember to change your water daily in the glass and don't give up on the floaters dude.