anyone use the Berkly Vanish line??

i just spooled up with the 4lb line...been using stren magna flex..always been a stren guy personally...

used vanish before...had twisting issues and it being real weak and breaking easily...

they were out of dang near everything in 4lb test because i was silly enough to buy it the night before trout season opened...had 4lb vanish saying "new and improved" blah blah etc....great! it will be invisible but strong!! going to be perfect trout line!!

WRONG!! STILL twists!(yes its on right!!!...even tied on a big heavy wooden bobber and sailed it out across a lake to make sure it would be good) and it still has....weak spots? real weird. i know you have to wet the knots...i do that anyways...but when im tightening down on knots, im breaking line!! 4lb test should not snap like nothing...and its snapping really easy in the middle of the line...not at my knots...i trim a foot or 2 or 3 every 15 minutes or so while fishing..(i run lures and spinners in a stream...good habit to get into after you learn that lesson!)

i know the line isnt frayed or nicked...its just breaking...

anyone?? ideas? thoughts? comments? similar stories?? cant wait to get magnaflex back on!!