It is still VERY early. Only one of my males started breeding so far. IMO your daytime and night time temps are too low. How warm do you usually keep them when not breeding. I keep my daytime temps at about 93 on the hot spot all year round. In breeding season I lower the warm side at night to about 80 but during the day it goes back up to 93. IMO you are asking for an RI with the temps you are at now. They really don't need such a drastic cool down.