Very Important to Understand
AI Clear, like most noise reduction, should be done at the very beginning of your workflow to achieve optimal results.
If you're pushing an image stack or product through AI Clear after already doing processing on the image you're not going to get a good result. You are likely to get much better results with Denoise or the Reduce Noise adjustment in these cases, where you can manually adjust settings to your liking.
AI Clear is not meant to be a replacement for Denoise or Reduce Noise, it's a completely different tool for processing images out of camera and quickly getting a cleaner and sharper result at the beginning of your processing