I got everything set up, and she's fine during the day (curled up in her warm hide), but at night she occasionally makes these kinda-hissing sounds (It sounds like she's sighing) when she goes into her warm hide, or just refuses to go inside her hide and tries to find ways out of her tank instead.

I have the thermostat set to keep her warm side around 87-88 degrees Fahrenheit. It that too cold? (maybe that's why she sighs/hisses at night?...I know they're nocturnal, so maybe this is normal?)