I've had it with being carpet-bombed by a recent invasion of cormorants in the general area of my marina. I've found plenty of helpful suggestions on the Web for preventing them from roosting on spreaders, masthead, lifelines, boom -- everything from inflatable owls to monofilament lines -- but now I need some useful advice for getting the existing guano off the boat.I spent close to 4 hours last weekend scrubbing the hell out of the boat, and while it looks far better than it did before I started (the words "unholy mess" come to mind), it's still a look way from looking like the pristine sailboat it was just a week or so earlier.I used Spic & Span, supplemented with Soft Scrub in selected spots for the deck, and Woolite for the main cover (as per Sunbrella manufacturer's instructions). But like I said, it's a long way from clean. I'm very frustrated, and nearly desperate. What do others use that gets the cleanup job done? Thanks for any advice.