Hi Roz, I am totally agree with Mitch view. If the leaves are infected with citrus miner then you have no other option left than to using pesticides. Don't worry they may not harm your whole garden area, as some pesticides are made-up of natural systemic ingredients like Indian Neem oil or other that don't let the plant get die because of any side effects. I would like to suggest you to call some professional expert like
exterminators in NYC
they will look out in depth to solve the issue.