Last year, for a test, I put some fly line dressing on my old line. Wow, that line shot out when I cast it. Much more distance.
Since then, I try to remember to clean my lines and think I’ll do it about twice a year. Sometimes, it’s about the basics that just make life easier on the river.
It’s pretty easy to wash line in soapy water, dry it, and then put on some dressing.
Tim Cammisa has this video below on what he does.