We are Angels Eyes converts here. I stopped using it for a while, and that's when I realized that it actually does help! We ran out and I just kept forgetting to order it

Lucky for us, our groomer carries it now. It might seem expensive (around $25) but it lasts for a loooooooong time

It takes a few weeks to start seeing improvement, though, so don't get discouraged. After 3 months, you can just give it every other day, but I just do it every day because otherwise I'll forget which day they had it