Why are you "shouting"?
First off, I assume you are feeding in the evening (usually works best for BPs), and by leaving the prey 'overnight', that basically means you should turn out the lights
& leave the snake alone in the dark room, no disruptions. Many are too shy to eat with human presence, and IF they're going to eat it after it has been presented the
usual way, some will take the opportunity in a dark, quiet room, once the owner stops hovering & leaves. Once you have the prey thawed out you shouldn't be re-offering
or re-freezing it, so why not take the chance & leave it. A few snakes like to be drop-fed, this way you'll find out, rather than just wasting it. Very doubtful that your BP
is going to wait until 3 am or the next daylight to eat the now-funky rodent...so bacteria is not an issue. Get it?