What actuallly causes line twist. I have a reel that if you have any slack in it is acts like an acordian. Kind of impossible to cast when it twists all up.

Is this caused by the way I put the line on the reel?
Is is true that there is a certain direction you want you line to come off the spool to prevent this?
Or am I just misfortunate.

Really annoying. Please help. Thinking about just putting new line on but want to know the answer to the second part about the spool before I do it.

Thanks,
Kind of a beginner fisherman question but I really don't know.