The invention relates to a method for managing a hybrid vehicle air conditioning system that includes a compressor generating coolness that is storable in a cold reserve, the heat engine having access to a control that automatically controls the starting and stopping thereof. The apparatus includes one or more food-retaining rings suitable to be disposed on a treating surface; and a ring shaped release tool, the exterior perimeter of the release tool being adapted to fit closely to the inside perimeter of the ring. Coolant supply is also provided for supplying cooling medium to the cooling coil and shelf with separate coolant supply and discharge lines from the coolant supply to the cooling coil and shelf. In one aspect, the strong Br\xf8nsted acid is present at more than about 50 wt % of the composition; however, the Br\xf8nsted acid can vary from about 10 wt % to about 99 wt %, more preferably about 20 wt % to about 90 wt %, and most preferably about 40 wt % to about 80 wt %.