The best thing to try is the hairdryer method !!
Tried and trusted .. especially given it’s taken a frozen thawed once already ..
I haven’t read through the original post but one mistake many make is to put them in a big /huge vivarium where there’s too much open space and not enough clutter and hiding places .
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Hairdryer method
My method is to thaw the mouse near the snake viv during the day , then in the evening ( wait until it’s dark or feed in dim light )
Then wait until the snake is well settled under a hide , open the glass door , using tongs give the mouse a good blast with a hairdryer ( plugged in near the viv ) then immediately dangle the mouse in front of the hide entrance .
If there’s no strike simply reheat with the hairdryer and again dangle it instantly whilst it’s still warm ... in the odd case you may have to repeat the process 5 or 6 times but in my experience it rarely fails .. . Follow the method closely and it works 90%+ of the time I’d say - the other 10% of the time I’d put down to the snakes being in shed mode and simply not interested in food .
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