wpcf7_validation_error) and action hooks (wpcf7_admin_after_general_settings, wpcf7_admin_after_form, wpcf7_admin_after_mail, wpcf7_admin_after_mail_2, wpcf7_admin_after_messages, and wpcf7_admin_after_additional_settings)$captcha->cleanup() if available and shorten cleanup period (in modules/captcha.php)



