The Importance of Getting your Heat Exchanger "Inspection Clean" Optimal cleaning to an "inspection clean" status ensures operational efficiency and a longer duration between heat exchanger cleaning requirements. Fouling left behind after inadequate cleaning activities will attract additional fouling at a greater pace once put back into service, leading to reduced heat transfer and a negative impact on production. Cleaning exchangers to optimal levels can reduce downtime and increase productivity, potentially saving an owner-operator a lot of money.