Don’t store wet lines. Modern marine line will not rot, but it will mildew. Dry your lines before stowing them. Coil line carefully for stowage. Never coil line around your arm like a clothesline. As you coil the line, twist the line with your fingers so the coils lay flat against each other. If one end of the line is attached to something (like a cleat), coil the line from the fixed end toward the loose end. This will allow the uncoiled line to rotate as you twist it with your fingers to coil it. This process works with both laid and braid line.