I left the Raspberry Pi I had soaking in mineral oil for a week after the flowers died and I realized it was time to wrap up the project. I had seen blogs talking about scrubbing your motherboard with soap and water, but that requires work. I tossed it in the dishwasher, shut of the heat and steam dry and crossed my fingers. After going through the dishwasher, we patted it down with some paper towels and left it out to dry. Ali made sure that I was patient (I was ready to put it in the toaster to speed the drying and start the testing.) Finally after two days, she let me plug it in. It worked perfectly.
In case you are wondering, we used Cascade.
Still probably would not recommend anyone else doing it.