i was fishing and had a 5 pound trout on the other end of the line but i lost it while i was trying to net it. when i checked the line it had broken at the knot. this has happened many times to me. i keep losing my jigs and lures and fish. why does this keep happening to me? is it my knot tying skills or my line is bad. ive been fishing for 5 years. the line is old and its like 6-10 months old