I take it that you are just kind of experimenting. That is a good way of checking the germination rate of seeds.
They need a constant warm temperature. Where did you keep the ziplock? Spritz the paper towel enough that it Is good and damp but not dripping. Lay the seeds on it and roll it up. Zip it up in the bag and it shouldn't need more water. I have a tower computer and I lay the ziplock on top of it...great germination spot. A similar spot would work just not too hot.
Were your seeds fresh package seeds?
