Cheers for the replies.

I will try leaving them longer after a few refuses and see how that goes. The normal who strikes and leaves repeatedly is probably the most anoying to be honest, cause you think she is going to eat, but then she doesn't. Quite often I will spent hours on a feeding night warming her rat back up and letting her strike again since she never eats if its just left overnight.

On the subject of husbandry, how do you guys in the US measure humidity? Over in the UK, both dial and digital humidity gauges are said to be inaccurate and people just go by good sheds / good general health to know if its correct. When I open my tubs you can feel the humidity (their water bowls are over the heat or they get very little humidity) but no sides ever get condensation, should this be ok?