Symptoms of a poor bed level include:
- print not sticking to the bed
- nozzle scraping bed
- thin or see-through first layer
When I get this, there are a couple of things that I check. First I check the printer mechanically:
- Disable any BLTouch probing
- Level the bed using a paper or feeler gage
- Create mesh bed level manually
- If troubleshooting, run a test print.
- Enable BLTouch probing
- Create automatic bed level
- Run test print
From following these steps, you should be able to accurately diagnose where the problem with your bed level lies. Address accordingly.