Why is my main banner blurry on Dawn theme?

[DanielRoman]

Hello, my main banner is blurry and I have no idea why. I looked at some other posts with people having the same problem but the solutions didn’t work. My website is nobluelens.com . If anyone knows the solution, that would be great, thank you!

[DanielRoman]

I fixed this by removing the letter “w” a bunch. I circled where I removed the “w” in the image. I have no clue why this works but it does.