If you’re experiencing skipped stitches, there can be a variety of reasons for that, including installation or bad needles. If your needle is bent or the tip has become blunt, you’ll need to replace the needle. Before that, though, make sure that the needle is properly installed, and that you’re using the correct size needle for your machine and for the project you’re tackling. Check your presser foot pressure (if applicable) to make sure it’s increased enough, and then don’t forget to adjust the thread tension accordingly.