The cheapest approach to maintain your machine operating efficiently is to routinely replace the sewing needles, which are inexpensive. As soon as you realize your needle is no longer shiny and smooth, it's a good idea to replace it.
It will be problematic if it is bowed, dull, or has a flat surface. Every time you begin a new sewing project, you should also change the needle. Additionally, learning how to fix your sewing issues can be of interest to you.