[Melany]

Cleaning LCDs requires special care.
That's the way to clean it that I've read in one magazine:
You'll need:

- rubbing alcohol (aka isopropyl alcohol)

- distilled water (not tap water!)

- A soft cloth (lint-free)

Dilute the rubbing alcohol into a mix with about 50% alcohol and the rest distilled water.

Pour this solution into a spray bottle.

Spray the mix onto a soft lint-free cloth. Old t-shirts and microfiber car wash cloths are both good choices. Large cloths are better since it helps to reduce the risk of leaving streaks on the screen from too much pressure.
And start cleaning)