[MENTION=39456]MalstRavane[/MENTION] like I asked previously - what does the feeding history say?
Does she still have mites? What have you been using? It's been 4 months since you started this thread, if there are still mites present I'd suggest you're not breaking the life cycle and need to reassess your methods. If she doesn't have mites she could be getting poisoned if you're using chemicals, especially since she's still very small.
Do you mean that you're feeding her live fuzzy mice?
Easiest way to thaw: put food into a bowl and fill the bowl with hot tap water (not boiling, not luke warm). If you're defrosting fuzzy mice they won't take long at all, make sure it feels warm and squishy. Luke warm water will go cold in a few hours so you're basically trying to feed her a cold mouse - that's why she's refusing.
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Woma_Wild is there anything I should add at this stage? I feel sad for this little woma