We tend to feed 3 hourly, and if she drains the bottle we top it up.

you could steam up your bathroom, but it is a bit hot for that, get a snot sucker (comes with fess lttle noses or nyal saline solution) hold her upright, elevate her bed, suck on her nose (i know its gross but when u r desperate...)

It is up to you whether you sterilise or not (see discussion below) and feed her at whatever temperature you prefer. personally we do room temperature.

It can last in the fridge for 24 hours

At room temperature it lasts about 1 hour

After. if you do it before it could mask her hunger

I don't see why bathing her should be a problem, after all, we bath or shower when we are congested.

hth