Dishtowels and tablecloths can be kashered by washing with soap. While the utensil should be cleaned, there is no need to wait 24 hours after the last use. Heat all surfaces of the utensil until it glows. Refrigerators and freezers should be defrosted, cleaned and scoured. Include all walls, shelves, and baskets.
Some people cover shelves with shelf paper or foil during Pesach.
Ovens and ranges should be scrubbed and cleaned. Include every part that comes in contact with food and all surfaces. After cleaning, heat oven and range as hot as possible for forty minutes. If there is a broil setting, use it. Continuous cleaning ovens are kashered in the same way as regular ovens.