Eather Nintendo doesn't know anything or their products suck nowdays (switch).
I literally clean EVERYTHING with alcohol 70% and it not just kills germs it makes things squeaky clean.
I literally clean my DS's, 3DS's, my vita, gba, gba sp, GBC, N64, DS original, WiiU gamepad, gamecube, dreamcast, cellphones, monitors, keyboard...you name it, and i do that for years! Oher than that alcohol is pretty great to have for hands also, although it dryes skin if used regulary...
Now nintendo should said not to use acetone, that thing stinks like hell, eats plastic and melt it if its some thinner one...
Alcohol? never! i actually recomend using it on consoles, just not directly ofc, use cotton and few drops on cotton is enough.
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Keep it simple guys just wash yr hands before you use yr switch
Thats not practical, cause some of us do not use switch an hour a day and thats it. i use it 5 min, than standby, than after 10min again, than standby, than after 2 hours again for 1 hour than i leave it, than after 2 hours again... its just not practical and ids jarring to wash hands EVERY time. Also why would you wash hands if you're at home.
Depending how is the law in your country and if youre allow to go out and when, and if you bring console with you...even without corona cellphones and electronics are full of bacteria anyway.
So using alcohol on it once in a while is also pretty simple. Washing hands is normal even without corona.
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From what they know at this point, you're generally unlikely to get the virus from a surface like that, unless someone very specifically coughed on it just then.
And if someone managed to get the virus on your system, you're much more likely to also catch it from that person wether you clean the system or not
There are things other than corona on your switch and cell... also its dirty and oily from hands.