I wouldn't try every couple of days, if you attempt to feed your snake and she has no attempt to eat, wait atleast 5 days. I feed my snakes in a seperate enclosure, and it works out fine for them, but like they said, every snake is different. What you should try, is to pre-kill the mouse(or hopper) whichever you are using, try to wiggle it in front of her face, if she shows no interest within a minute or 2, just hold it still in front of her face. Reason I say this is because of my 2 snakes, I have a White Lip Python & A Yellow Anaconda, my annie I have to wiggle it in front of her, as for my Python, if I wiggle it in front of her she goes up to sense it then she hits her nose on it and goes away, so what I do with her is i hold it completely still and she takes it then goes to the bottom of the tank and lets it go, then does whatever she does and goes back and eats it.

*EDIT*
Also, what I do is I skip every 6th meal on my snakes, so they clean their system out, because lets face it, in the wild they don't eat every week.