Ah, the dreaded outlet hidden back behind something big, heavy, hard to move for any number of reasons. I have the "tripped" GFI issue every time we get the house exterior power washed and after hurricanes. After a couple of "trips" following routine rain, I opened up all the outside outlets that were down-stream from the master GFI receptacle with those two buttons and found a couple of them had a lot of corrosion and bug detritus around the wire attachment screws. I replaced those receptacles with new ones (and brightened the wire ends) and replaced the outlet's rubber water seal - still have an occasional problem (primarily the pressure washer) but nowhere near the number of problems in the past.
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