I bought this to fix the power switch on my fish finder as I read on a forum it might solve the problem. I took everything apart and detoxed all the electrical connections and straps and somehow that fixed my fish finder. I was skeptical at first and the product is a little smaller than I expected but not by much but makes a huge difference and I didn't even make a dent in the small bottle. It also saved me over $1,000 on a new fish finder since mine was out of warranty. So if you're having trouble with yours, give it a try because it's only $8 a bottle.