https://www.practical-sailor.com/blog/Quick-Tips-for-Cleaning-Rope-12008-1.html?ET=practicalsailor:e37200:2082152a:&st=email&s=p_Grabbag031818 Check out these guidelines about cleaning your lines. Use of bleach is definitely not recommended. Dave Hupe 1994 Cat 320 "Mayan Sun" (#32) Holland, MI