Prolonging the lifetime of the build plate is to use a sharp scraper for releasing the model from the printing surface. After the plate has cooled down, gently slide the scraper underneath one of the corners of the model then carefully bend the sheet to remove the model.
Bambu Lab 3D printer comes with scraper models. Print 'Scraper grip' from the built-in files! Here is the STL Model！
01 pc of scraper
Please watch the video on how to install the scraper: