Temps have been in the high 80’s for a couple weeks and the past several days have been in the 90’s. I usually keep my rods in the car in case I see a spot I wanna fish. I have pretied 8lb. Fluorocarbon leaders on my rods for tossing 4” senkos for finesse fishing.
 

Past few years I’ve caught lots of nice bass on those setups with no issue. Today I had about a 3lb largemouth on and then the line snapped. I had my drag right and everything. So I grabbed my other rod and casted that out. Had another bass around three take it. I’m reeling him in and the line snaps. Really T’d me off man! ? lol

 

Anyway, so do you think that heat could compromise my line. I don’t want to give the excuse that I simply bought a bad batch.

140 degrees f shouldn’t bother Fluorocarbon, weaken Nylon mono line, Copolymer  por hybrid line. 

Leaving a knot tied 24 hours with everything but braid weakens the knot do to stress over time causing plastic to cold flow.

What lb is your line vs drag force?

Tom

My rods and reels stay in my truck during the summer. I have a rod sleeve on each rod. Been doing it this way for several years and have had no issues with my line. I use mono, floro and braid.

Thanks for that Awesome info Tom. Ok, so I was using Bass Pro Offshore Angler Extreme Fluorocarbon. It does say that Seagaur makes it. I’ve used it in the past with no problems. Hoping that going cheap didn’t cost me this time.

I left a rod leaning over a baseboard heater for a few weeks once. The mono line on it was brittle the next time I used it. There's no telling how many cycles of heating and cooling it went through. I'd try to keep it out of direct sunlight for sure.

Check your rod guides first, then consider better line.