I don't like to leave them in papertowel. It encourages fungus that kills the seeds. Next time you have seeds in papertowel for 3-4 days, smell it. Maybe its just the area in which I live. I like to toss them in a cup of water (submerged) that is in my light room ~80F. As SOON as they pop, i pull them out and plant them. They will be up in 2 days.