Pair when a cold front or storm are coming - Low pressure is your friend.
Use shed from other animals in the enclosure, don't forget to mist the shed.
Pair with a female that just shed.
Mist the enclosure.
Use a sperm plug from another male and put smear it on the female's back.
Put two females in the same enclosure with the male.
Switch bedding and use the bedding of a strong breeder.