JUST STICK OR WRAP SOME CLING FILM ON TOP AND USE IT
it becomes dust/dirt proof and water proof
and you can change it as and when required
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As far as interstellar communication is concerned, telepathic information sent via electromagnetic waves is often not desirable because even sent to the nearest star, electromagnetic signal will take four years to arrive there! That is the reason…
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Darn it, I took your advice and looked around for some cling film but found only duktape ; that didn't work on my lop~top.....................