My Iguana seems to be ill?

Today my 3 year old iguana crawled out of his tree and down to the floor of his cage in a weird spot, and basically quit moving. I just moved into a new home and have had some heater issues. It has probably got down to 65 or 60 in my house. Ever since we moved here he has not been eating the same. I picked him up off the floor and sprayed him and placed him back next to his light. I also have the humidifier on next to his cage. He seems to be coming around a bit but i really dont want him to die. The floor of his cage is colder so i dont understand why he would stay down there. Can anyone ist with advice?