Fill a completely clean container, that was not used for 24 hours, with water. Turn on the microwave and let it steam heavily. Turn it off and wipe out the inside. To use the microwave during Pesach, use a flat piece of styrofoam or any other thick object as a separation between the bottom of the oven and the cooking dish. When cooking, the food should be covered on all sides.
Sinks Meticulously clean the sink.
For 24 hours before koshering it, do not pour hot water from Chametz pots into it. Afterwards, boil water in a clean pot which was not used for 24 hours, and pour it 3 times onto every part of the sink, including the drain stopper. Afterwards, line the sink. Refrigerator, Freezer, Cupboards, closets, Tables and Counters Thoroughly clean and scrub them to remove any crumbs and residue. Afterwards, cover those surfaces that come into contact with hot food or utensils with a heavy covering.