We have all had it happen. You get a new pole or new line and your new line gets rats nest when opening the spool or casting. I have found that if you submerge the spool (not entire reel) under water in your kitchen sink prior to the day you plan fishing helps. This helps soften the line, also when you get out fishing tie on the heaviest sinker your line will hold and drop it down your hole and reel it up. This will stretch the line straight from the coiled position.
Three-fourths of the Earth's surface is water, and one-fourth is land. It is quite clear that the good Lord intended us to spend triple the amount of time fishing as taking care of the lawn. ~Chuck Clark