I need help

So I got a leachie gecko which is around 4-5 months old around 3 moths ago, but now after a while the small leachie has stopped moving which is wierd because it was super active before. I havent had a heater because the breeder told me that it could thrive without one but I forgot that my house gets down to 20C during winter so the gecko has gotten cold so I tried the arcadia heat projector which I have on my cresties cage for around 2-3 days but it still doesn't move, I have handfeed it so I know its eating but its still not moving, any advice?

When I use the heater the cage is 24,2C