Quick answer
Browser cleanup can remove cookies and session data, so review cookie-related cleaners separately when preserving website sign-ins matters.
By BleachBit.app Editorial Team · Published October 6, 2026 · Updated October 6, 2026
Why logins disappear
Websites often use cookies or local storage to maintain sessions. Removing them can require signing in again.
Separate cache and sessions
Cache files differ from cookies, history, and saved sessions. Select only categories that match the cleanup goal.
Recheck after updates
Browser storage behavior changes over time, so review selections after major browser updates or profile changes.
Frequently asked questions
Should I use Preview first?
Yes. Preview helps review the scope before data is removed.
Should every cleaner be enabled?
No. Select cleaners for a specific goal and only when you understand the data involved.
What after changing settings?
Run a small cleanup and verify normal Windows and application behavior before expanding the scope.