Had that happen too. I had to thoroughly remove and dry out the outlet in the basement and box above the vacuum, also the outlet near the floor between the dinette and refrigerator wall and inside the furnace compartment under the refrigerator. (assuming you have gas/ac refig and gas furnace) I used rags, sponges, paper towels, and even wet/dry vac. Most important was the use of a blow hair drier to dry out the outlets from both sides. (remember to open the circuit breaker also before doing this).
Matt & Lorraine Moniz
'05-36MDDS Alpine / '14 Honda CRV