Why a spinner twists the line

The blade always spins in the same direction. That motion passes to the shaft, from the shaft to the line, and each turn adds to the one before it, for as long as nothing stops the spinning.

Where the twist goes

The line twists along its entire length — from the lure to the reel. It lies unevenly on the spool, and on the next cast it comes off in loops. That’s the same “bird’s nest” that gets blamed on the reel by mistake.

Why a swivel is essential

A swivel breaks the chain: the lure turns its own ring while the other one stays still. Without it the twist doesn’t lessen — it just keeps going, and no retrieve fixes that.

Not every part with rings saves you

A plain snap or a figure-eight connector joins the line but doesn’t turn under load. Only a part that turns under the same load the lure itself pulls with will do the job — you can’t tell by looking; you check it by hand.

What the type of line does with the twist

Braided line has no memory and twists with no give, so the effect shows up later — but it also untwists worse. Monofilament twists more readily and partly straightens itself back out under tension.

Where the twist shows first

First it shows on the leader near the lure: it turns into a coil spring. Then loops appear on the spool, and only after that does the braid start coming off as a “bird’s nest” on the cast. It’s not worth letting it get to the third stage — you’ll be untangling it by hand on the water.

One swivel or two

One goes near the lure, where the spin is born. A second is sometimes placed at the join between the leader and the main line: it catches whatever slipped past the first one. More than two make no sense — every extra part is one more point of failure. And neither one works if the swivel itself has seized: you check with your fingers whether it turns under a force close to the working load.

How much can build up

Twist builds up with every cast, not with time on the water: ten short retrieves give more of it than one long one of the same total time. So you check the leader itself, not the clock — it shows the state first.

How to undo twist that’s already there

Let the line out without a lure, downstream or into the wind, and let it straighten out freely, then reel it back in under tension. This clears what’s built up but doesn’t change the cause: without a swivel the twist will come back from the very first cast. On the bank the same thing is done more simply — take the lure off and run the line through your fingers along its full length.