I am treating everyone with the E fix (currently the second week of treatment), then waiting for at least 2 full weeks after the treatment is finished to put my pairs together. The main ingredient in E fix can be tough on repro organs, so I'm not taking chances, I just want to make sure everyone is "clean". That said, it will likely be about mid-to-late Feb when I do finally put my pairs together.
How often were you feeding insects last year, if at all? My virgin girl laid mostly duds, but they were well calcified. I would always keep a cap of calcium powder in there for her to lick as needed, (no d3) along with her normal diet of CGD.
I also mix the CGD a little on the thicker side, as mine like it better that way.
How long have your girls cooled for?
Help! Crested Geckos! 0.1.Leachie, 2.1.1 Gargs, 1.0 Chahoua, 2.1. Blue Tongue Skinks, 1.1. White Lined Geckos, 1.3. African Fat Tails, 2.2.0 Tokay Geckos, 1.0. Giant Day Gecko, 2 tarantulas