Wait for the cues that your snake is hungry and looking for a feed. After dusk each night, I check on my pythons... if they're perched up high on a branch in a poised position in their enclosure or actively roaming around and get interested in my presence when they notice me watching them, it's a good sign they want a feed and I'll offer them food. If I check on them after dark and they're coiled up tucked away and inactive I don't bother. They're either still good from their last meal, coming up to shed or having a quiet night in. Snakes are easy to read when you let them do the talking.
Don't come knocking on their door at midday with a feed and open their enclosure up and disturb them by shoving a feed in their face... if you came and ripped my blanket off me at 1am when I was asleep and jammed a feed in my face, you'd be unsuccessful too. Lol