Is this a common procedure? I just set some eggs last night (first time), and I did not put a sticky mat down. Now, I'm wondering if I should have??? Can you please tell me what the pros are, and the cons if there are any?! Is it more to keep the eggs in place, or is it more to help the baby chicks out when they are born? Do you wash and re-use, or just toss? Oh, and FWIW I have a Brinsea Octagon 20 Eco. Thanks in advance!