Fog: Nature's Stain Remover?

Living in Nova Scotia these past few months has given me my first real experience with fog. I have to admit, I find it fascinating. On the south shore this weekend, I heard the fog before I saw it. The fog horn started to send out the alert as the clouds (do you call them clouds?) began to roll in. Soon enough, the blue skies were gone, replaced by grey mist.

People here complain about the fog, but I think it's incredible. When the weather is hot, it's the perfect air conditioner. And standing outside as fog envelopes you is sort of like being in a spa.

Our friend Carolyn tells us that fog gets stains out too. Wash your clothes on a regular cycle, she says, then hang them outside for a day or two in the fog and the stains will be gone. I have yet to test this theory myself but I'm intrigued, and so far Carolyn has not led us wrong.