One way to tell if you are good is to use your BLC. Recirculate normally. Dump the line. Then let BLC sit still in the line for 3 hours. Then pour an ounce of the line into a clear glass or white container. Is it clear? If yes, then you are better than good.
If not, then expose your line to BLC for longer than 15 recycled minutes. I don't recirculate and let the BLC sit in the lines for 2-3 days with two purges a day before it drains clear.
The acid cleaning can be a longer than usual contact with StarSan, but this has not been needed after a few days with BLC.