.... What might concern me is that if the body (E-M1X) has any fine sand covering then to use a cloth, even a wet cloth, risks finely scouring the camera body surface. As happens on car body paint work - Never rub off seagull poo before gently applying either water or specialist detailing spray first because it often contains fine grit.
.... Yes, Olympus will be covering their arse and also, to be fair, advising customers to be warranty aware.
That video clearly shows the extent of which I would want to be able to wash the body should it be needed. Thanks, Graham.
I think that a small watering can with shower head, which in fact is directly equivalent to a rain shower, should do a very good job of washing any abrasive debris off the body before a wipe with a microfibre cloth.