Cold rooms are the reason a lot of winter germination attempts fail, since autos want the seed sitting somewhere between twenty two and twenty six degrees to crack reliably. A router, a cable box or a cheap reptile mat under the tray all work. When I compared germination success at different temperatures using the log posted on https://turboautoflowerseeds.com the drop off below eighteen degrees was steep. Keep the seed warm but out of direct light until the tap root shows.