If your reading this thread based on a similar issue....
Basically you replace the boil kettle screen* every year like you replace all your hosing/lines if your proactive and on top of your brewing. I have a plate chiller and find that my boil kettle screen filters a lot of trub from getting into my chiller.
I did a group brew with a friend's 15g pot as one of the boil kettles (24 brix barleywine). Even with a low hop beer there was significant trub in the chiller afterwards versus a hoppy beer with my kettle screen. I mean there was a ton of difference and I late hop my IPAs with 8oz per 5 gallons.... and still this Barleywine let a ton of goop in.
I am not advertising MoreBeer, I am just pasting a picture of what I use. I do believe it helps a lot, but is not a complete solve for the plate chiller conundrum**.
**Now that I have this, now that I love this.... can I ever get it truly clean? Do you soak, rinse, boil or bake.... keep searching (I power rinse and bake, fyi)