On the birds or the stains? I tried all the usual remedies including a careful rub of magic eraser, no go. I bought some of the Starbrite bird and spider stain remover to try when I get back from NJ so we shall see. Not happy.
I think this will work. It looks like you can mount them to the vent covers and the Bimini while closed. This should help quite a bit. My cover is disgusting!
So I installed the stopgull product on my boat today. I used the boat vent 3 on the 1st and 3rd vent positions and I was actually able to use their Bimini product on my Bimini without having to modify it. I then attached the three stopgull airs and they are now spinning above the boat. Hopefully this will keep the birds away!