Yesterday I cut the same file twice and both have random lines in them. The first had a couple of smaller vertical lines in it. I cut the second one due to the small lines in the first and the second was far worse with horizontal lines all the way through the letters.
The file is exactly the same file and the lines are completely different.
(The odd texture you may see behind/through the acrylic is my beat up table it’s sitting on. Don’t let that distract you)