It’s such a tough thing to do, to articulate all that you feel you need to in order to stand out, while also being succinct! Not many authors really have the hang of it. Sometimes it’s worth throwing the old cover letter out and starting fresh…try starting with different opening lines and see where they take you. You can then cut and paste your favourite sections from each cover letter and come up with something entirely new, and hopefully fresh! Or ask someone else to write a cover letter from the bullet points you give them…you never know what they will come up with! I find that researching what others have done is also helpful…and at least it gives you somewhere to start! Good luck!!