Take a spray bottle and mix 1 part isopropyl alcohol with 1 part water. The sprays bottles are easily available at home, but if you don’t have any, buy a new one from the local store. It will not be expensive. Isopropyl alcohol is also known as rubbing alcohol, which is easily available in the market.
Now take microfiber cloth and spray some quantity of the liquid on it. The cloth should only be dampened. Don’t ever spray the isopropyl alcohol and water mixture directly on the screen, because this might make things problematic.
Wipe the damp cloth from one side to another on the screen. It should be done smoothly, putting no pressure on the screen. In the meantime, make sure you don’t wipe in a circular motion, because the dust can scratch the screen this way.
After wiping the entire screen with the damp cloth, quickly use dry microfiber cloth. It should also be done very smoothly from one side to another. Your screen is clean now.
If you feel that there is still some dust left on the screen, repeat the procedure. Use cotton buds to scratch out the dust in the corners, but very gently.