It is important.
It has to be done very calmly and very carefully.
On touch screens if they have not been cleaned for long the britness can appear twice after cleaning.
At your own risk. Use common sense.
A soft moist cloth, soft kitchen tissue paper etc can be used.
Remember dust particles are abrasive. The first touch should be very light.
Then a new cleaning tissue should be used to continue.
If a hand air blower is available it can be gently used before beginning.
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