Hi Paul,
Thanks for asking for me!
This is interesting. One of my tropical Thunderbolt 6's shows very little memory now (for cool UK climates). I can't remember what i did to it, but;
1. I cast them on grass a lot
2. I clean then regularly in warm water and soap
3. I stretch them
When I store my saltwater lines between trips I first put them in warm (not hot) water and give them a stretch. I hold the stretch as the line cools (I do this an arms length at a time - it cools very rapidly). I then treat the lines with a normal silicone based treatment before storing them in large open coils on a board.
Thank's James, if you pull some line off a reel now, does it show severe memory? I just found it fascinating that my older thunderbolt shows pretty much no memory.
Thank you!
All the best