I feel you when you say that you are tired of using the old zester that gives you a hard time to finish zesting even one lime. I bet that it tests your patience when it comes to spices too. If I am right, then perhaps you need to search for a new better model and upgrade your kitchen tool. No matter how small it can be, missing a tool when preparing food could give you discomfort in many different ways.
Hence, do not underestimate the absence of a zester. Look for one now, and end your misery. Check out the top zesters that I found in the market today and see if you will fall in love with one to bring home. Keep in mind that each product has different features to offer and picking one could be a bit tricky.