New printers abort more prints in week one than in the next six months. Most of that is the first layer, not the model.

What I see on every new Bambu / Ender / whatever-was-on-sale:

• Bed looks clean. It is not. Finger oil on a textured sheet will lift PLA at the corners. IPA, then print. Shirt wipe does nothing.

• Z is a guess. Paper-drag the nozzle. If it scrapes, you are grinding. If the paper slides free, you are too high.

• First layer at 60 mm/s with the fan on. Slow it to 20 mm/s. Fan off until layer 3.

• Bed temp copied from a YouTube video for a different sheet. PLA on PEI is usually 55–60°C. If you are at 70 and it still warps, you are cooking the corners.

Print a 25 mm square, not a 12-hour benchy. If the square is even, you are ready. If it is not, you do not have a file problem.

I sell a one-time calibration pack and a separate 1-hour live rescue. They are not bundled on purpose. Files stay. The hour expires in 14 days. Do not buy “lifetime support.” Nobody can sit on your printer forever.