This sounds like an incorrect assumption because there shouldn’t be a need to clean anything up if there isn’t a mess to begin with. Is your site getting hit by a lot of spam bots? If so, can you try installing this plugin:
The support post ‘Event Espresso 4.8.x clean up does not seem to be working’ is closed to new replies.
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Support forum for Event Espresso 3 and Event Espresso 4.