If a record is obviously grungy I do a first cleaning pass with RRL Deep Cleaner and a Last brush. That removes the worst of the junk before I use the good DD brushes.
It's not hard to rinse a Last brush and even vacuum it with the Loricraft nozzle, and they're cheap enough to toss when they get soiled.
Like Tbg I rinse the DD brushes periodically during a cleaning session. I then brush them off using the long-bristled Loricraft brush, which I don't find useful for anything else except spreading Premier spray cleaner.
It's not hard to rinse a Last brush and even vacuum it with the Loricraft nozzle, and they're cheap enough to toss when they get soiled.
Like Tbg I rinse the DD brushes periodically during a cleaning session. I then brush them off using the long-bristled Loricraft brush, which I don't find useful for anything else except spreading Premier spray cleaner.