Great question — answering as the UphillTech team:
For UK unwashed eggs, I'd just wipe them off with some kitchen roll, allow them to dry & put them in the fridge, as normal. You can't 'fix' it by washing them thoroughly, as then they become 'amateur washed eggs' with less protection than they would have in a country that does wash eggs as a matter of course. A bit of dried egg really won't be a prime target for going off, compared to a badly-washed one.
Full answer by Tetsujin: https://cooking.stackexchange.com/a/125275 (CC BY-SA 4.0).
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