What should I focus on when auditing a CIP system during a factory visit?

• Check CIP return conductivity is ≤5% of the set cleaning solution value.
• Confirm each loop flow velocity ≥1.5m/s to ensure turbulent cleaning.
• Review SIP records verifying steam sterilization at ≥121℃ for 30 minutes.
• Check spray ball coverage report confirming no cleaning dead zones.
• Require a cleaning validation report including ATP test results.