Be patient. If they're only 25/26 weeks old, then they're really still in the "new laying phase" and still getting "situated". Give them another month or so to get into the swing of this laying thing and it should pick up quite a bit. Plus, as others have mentioned, high temps (and any other types of stress) will put a damper on laying no matter what their age/health. So if you can't find anything else that may be causing them issues, then just hang in there. There's an egg flood on the horizon!
Side note, since you mention blue eggs and Ameracaunas....unless they're pure bred Amera's and not the commonly mis-represented EEs, there's no guarantee of blue eggs.