Set your print bed to your normal operating temperature before doing any leveling. Heat can alter the level so doing this on a cold bed could give poor results
Once nozzle has stopped moving, slide a piece of paper between the nozzle and bed. If you are unable to fit paper between them you might need to tighten your bed adjustment knobs to lower the bed until it fits.
Wiggle the paper in and out while at the same time loosening the bed adjustment knobs until the paper just starts to get pinched between the nozzle and build surface
if the PLA you’re using recommends 190-220, I recommend trying to stay around 210-215 for the first layer and then lower to 205 the rest of the print if necessary.
print every material, every time, at 15 mm/s for the first layer. This is very slow but you want to make sure your filament has time to fully melt in the hotend before getting extruded. This avoids “extruding dry” which can make your initial layer adhesion suffer.
If the filament is not laying down, your nozzle and bed are too close to each other. End the print and tighten your spring a little and run the print again to make sure that the filament is laying a smooth line.
If the filament is sticking or curling around the extruder head rather than the bed, your bed is too far away from the nozzle. End the print and either loosen the bed a bit in each corner or lower your first layer percentage
