I think its been pretty cold for some time where you live. "He" may just be reacting to the seasons.

The temps should be 82-84 warm, 92-94 hot, humidity is dead on (outside of sheding). Has handeling increased over that period? Remain consistant with your routine. I handle twice a week for 15 minutes (tops). Offer to feed during the evening hours when they are most active. Consider changing the color of the feed. I was told (on my recent purchase) that he ate brown or grey and the result after 2 weeks trying was white. I have no logical explination as to why, but white is working for him at this moment. Where is "he" located? Is there a great deal of activity? Has your setup been relocated to an area that is subject to more traffic? Just a few things to consider and I hope it helps your efforts. Best of luck and be patient. My ..