Scissor beak finch

[David]

Hi everyone, I just curious about my finch's beak, I just trimmed her beak around 2 weeks ago, but today I see her beak(bottom part) is overgrown again :/ do I need to keep doing this every 2weeks? I don't want to stress her out even I just calmed her down from my palm, please give me some advices. I put cuttlebone in her cage before and she used to peck on it (like few months ago) but now she stopped using it, did she forgot how to use it? I put the pedi perch-like for her still not helpful. Her beak just became like this recent months, so not born like that, anyway I can avoid her overgrown in the future? I fed her with same food as other finches, she's the only one got this problem. Thanks in advance!

David