How to undo stuck spoke?

One of my spokes is very loose but I can't seem to screw or unscrew the nipple - it just results in twisting the spoke in either direction. Any tips how to free it up or should I cut the spoke and try and do it with pliers?

Cheers
Dan

Cut it off, then insert new one.

If it is due to corrosion, a few drops of WD-40 into the threads & letting it sit overnight might do it. Caveat: if you are running sew-ups don't do this, you'll need to cut the spoke & peel off the tire, etc.

Before you cut the spoke, just make sure it'll be easy to thread in a new spoke. If it's a back wheel, you may have to remove the freewheel/cassette in order to remove the old spoke and thread the new. If that is the case, it's worth spending more time to free up the spoke/nipple, enabling you to reuse them both.

Don't forget to keep both sections of the spoke if you cut it so you can measure it and reorder a new one (mebbe safer to take the two bits to the bike shop so they can do the measuring).

Instead of using the pliers to cut the spoke, you could use them to hold the spoke and prevent it from turning while you loosen the spoke nipple.

Best if you have a spoke key that grips four sides of the nipple rather than just three - it's less likely to round off the nipple flats.

Might be worth tapping the spoke with eg a screwdriver just where it enters the nipple - that'll help free it up.

Good luck.

Don't mess about twist it till it snaps then replace it. You may have to remove your freewheel/cassette for this. So be prepared.
Course if it is just lose and the wheel runs ok; if it aint broke don't fix it.