I use 4# mono for icing trout and line twist is killing it. It really shows up on low poundage lines.
I do a couple things that are causing it:
Retrieving while being spooled by a fish...
...stop that;
Using the common method of spooling new line onto your reel...
.unless the diameter of both the spool on your reel and the spool the line comes from is the same, you will get line twist. This even assumes that you are spooling line onto your reel the same way as it comes off the spool.
So next time I put new line onto a reel I'm going to:
Take the empty spool off of my spinning reel;
Rig up a good diameter arbor/dowel that will accommodate the arbor hole on the spinning reel;
Put the arbor/dowel into the drill chuck of a cordless drill;
Place the reel spool on the arbor/dowel (must be snug fit);
Tie your line onto the reel spool;
Secure the line spool so that it can spin vertically (screwdriver in a vise);
Hold the drill so that the reel spool will spin vertically when power to the drill is applied;
Make sure you are about to wrap your line onto your reel in the correct direction!!!!!!!!
Place some tension on the line between two fingers of one hand;
Apply power to drill with the other hand;
Move fingers holding line tension to ensure uniform wrapping on reel spool;
Remove power to drill when reel spool is full (leaving 1/8" free space on spool).
Guaranteed zero line twist.
Or you can buy this for $45.