How to clean water strainer?

Hey guys, I have an 08 lsv and I have the raw water strainer. When I bought the boat new in 09, the strainer was clear and I could see what was going through it easily. 5 years later and it is real cloudy. I can see into it if I look closely but I would like it to be clear again.

What would you use to achieve this? I was thinking about CLR or something similar. Thoughts?

http://img.tapatalk.com/d/14/05/11/ugapa6aj.jpg

That or simple green,

Let it sit with a vinegar solution for a few hours and then brush out.

Thanks guys.

You could try a little oxy clean, the laundry detergent, in there with warm water for an hour or so too. I used to use that to clean our brewing equipment.