I'm gonna try my "airlock gun" idea first, an exacto knife is too big to get in there. I could probably get at it with a toothpick maybe... But good idea, need to take a picture when I get home. I hope those stains come out of my bathtowels.
I had a more traditional JAO I topped up too much at the same time and it filled the airlock. There was no dramatic explosion, but I was able to use my spiffy new carboy cap to siphon some liquid off. I tell ya, starting a siphon by simply blowing into the cap is really nice and easy!
Wear safety eyewear before you do that, just in case the airlock blows before the raisin does!
Oxy-clean soak and then cold water... it's about all I know for stains...
And I think the raisin caused the explosion, if it hadn't gotten stuck, the goo would have settled for oozing out the airlock and down the side of hte carboy instead of building up pressure like it did with the raisin blockage.