Well the shock gum worked well. Neat stuff, it streches and returns to the original length. But I realy think I had some bad tippet all along. I triesd some fresh Orvis 6X Sunday and fished all day with no problems. I think the fluorocarbon is very sensitive to heat. I keep all my equipment in my work truck so I can fish after work. I try to keep it out of the direct sun, crack the windows, but I guess it's not enough. But, the shock gum will help with light tippets. I'm glad I found out about it. Thanks for all the advice.