What type of the screen?
If it is a glossy screen:
1. Take some vaseline or anal lube and fill the scratch with it.
2. Gently wipe off the excess vaseline or anal lube, being careful not to press too deeply so as to leave some inside the scratch.
If it is a matte screen:
1. Take some vaseline or anal lube and fill someone's ass with it.
2. Gently fuck someone's ass, being careful not to press too deeply so as to leave some inside ... then buy a new laptop
Also you can try any shit like this
https://youtube.com/watch?v=JfyDd636ehs or any CD/DVD repair kit or scratch repair kit.