BleachBit is a useful option for users reclaiming space from known temporary data. Run a preview with a small selection of cleaners and inspect the listed files before deleting anything. Start with a small, representative task so you can check the results before extending the setup.
Avoid selecting unfamiliar categories simply to maximize reclaimed space, and keep backups of information that must remain recoverable. Consider the practical trade-off: cleanup can remove useful session data.