To fix this problem and improve the quality of the prints you should tighten the drive belt. All you need to do is find a puller and fix the belts. If you are unable to tighten it, hire a professional to help you out.
Conclusion These are some of the ways in which you can improve the quality of your 3D prints. When buying the printer ensure that you buy it from a reputable store. “3D printers”, the term defines itself.