So I went down to the lake 3 weeks ago and went out to the boat to check on it and the entire grey cover had bird crap stripes all over it. I keep it under a boat house up on a lift and have never had this problem before. I went home and ordered a birdx bird repeller and plugged it in, and went in the house and watched. It appeared to be working, it has a motion detector on it and emits some sort of high pitched sound the birds didn't seem to like. Last weekend I came back down and it looked like they invited all their friends over and had a crapping party. I ordered some sticky caulk that you apply to the tops of the rafters with a caulking gun where they sit and do their business. It is suppose to stay sticky for around 10 months and it says the birds don't like it and it keeps them away. The only problem is I didn't read the fine print that says "small" birds may become stuck!! So I went out Saturday afternoon to find two birds stuck there looking at me. One got loose and when it saw me, hopped between my legs thru the open pontoon door onto the dock and the dog chased it down the dock into the water, where it is now turtle food. The other one got loose during all this and just jumped in the lake and is also turtle food. My question is: does anybody have any other ideas. It is just a weekend place and I am worried there are going to be 100 dead birds stuck to the rafters of my boat house when I get back this weekend.