How to keep your 3D printer in perfect shape for consistently flawless prints

Always level the bed before any print job (Have the bed level on all the sides)

– Clean the nozzle and the 3D printer bed.
– Home your printer so it’s in the 0,0,0 position.
– Move the printhead to one of the corners of the bed and slide the paper between the nozzle and the bed.
– Lower the printhead until it touches the paper, and start moving the paper back and forth as you lower the printhead until there’s some resistance.
– Adjust the screw on that side and move the printhead to the other remaining corners of the bed and repeat the same as you adjust the screws.
– Move the printhead to the middle, slide the paper and check the resistance and adjust the screws if necessary, and you will be done.

Regularly clean the 3D printer bed and nozzle (A clean 3D printer bed and nozzle contribute to a better first-layer adhesion)

Tighten and adjust the screws, nuts, and belts (Ensure your 3D printer is stable)

Regularly inspect the wires (Wires can get damaged with time)

Lubricate moving parts (Reduce friction on your 3D printer)

Maintain your 3D printer to get perfect prints
Maintaining a 3D printer should be a regular routine to ensure consistent, high-quality prints. Replace worn parts—like nozzles—instead of trying to fix them. Also, keep the printer in a stable, vibration-free, and dust-free environment.

Credit : https://www.xda-developers.com/keep-3d-printer-perfect-shape/