To ensure phenomenal prints every time, there are a few maintenance tricks that you should keep up with. The tutorial below highlights: replacing the kapton tape, and greasing the z-axis rod and the x-axis idler pulley.
When picking out the grease, keep in mind that the brand itself isn’t really as important as having the grease be PTFE-based. Some examples are: Do It Best Hardware Store and Dupont Teflon Non-stick Grease.