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Some of the Laws - Customs of Passover

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Laws for koshering the kitchen for Passover
According to the ruling of Rishon Le Zion Ovadia Yosef zz”l
 

Terminology

Libun Gamur – burning with fire until sparks come out of the utensil
Hagala – immersion in boiling water that is on the fire. A pot which has not been used for 24 hours is employed. Bring the water to a boil. Completely immerse the utensil(s) and allow the water to come to a boil again. Leave in the water for only 30 seconds. Rinse in cold water. Some heat a stone prior to putting the utensils in and once the utensils have been placed into the pot, the stone is immediately placed into the pot as well. This brings the water to an immediate boil and assumes that pleta goes into the stone preventing reabsorption into the utensil.
Iruy kli rishon – pouring boiling water on the utensil or surface. Counters and laminated tables would require this.

Soaking in water
Simple cleaning
K’ bolo, kakh polto – as it is used, so is the methodology for koshering.
In all cases, the object must be cleaned and then left for 24 hours without use.
 

Regular oven – set on highest usage for 2 hours. If one has placed hames directly on the racks, they need to be replaced for Passover
Self-cleaning oven – clean and use this setting.
 

Microwave - clean thoroughly. Place a cup of water with bleach or cleaning fluid. Turn on to produce steam (about 20 minutes) and then wipe

clean. The glass tray need only to be wipe clean.
 

Gas stove top – clean thoroughly under the tray where edible hames may be unnoticed. Elements and burners should be immersed in boiling water. Boiling water should be poured on the surface. 
 

Electric stove top – should be cleaned and allowed to burn for 20 minutes.
 

Dishwasher – clean thoroughly for all hames. Leave for 24 hours. Turn on the dishwasher without dishes and hot water only cycle. Plastic racks are shrouded in controversy as to whether they can be koshered.
 

Clayware and porcelain cannot be koshered.
According to Haham Ovadia Yosef – glass, pyrex, duralex does not need to be koshered as no cooking takes place in these and there is no absorption. They simply need to be wiped clean. Others hold that they need to be soaked for three days, changing the water every 24 hours.
Simply wiping clean:
 

Refrigerator and its trays
Garbage cans
Chairs
Hot water urn
Dentures

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Plastic utensil – This area is of greatest debate. Rabbi Moshe Feinstein zz”l declares that plastic utensils cannot be kashered for Passover. However, Haham Ovadia Yosef zz”l, Haham Mordehai Eliyahu zz”l, Haham Haim David HaLevi zz”l hold that plastic utensils without grooves can be koshered by hagala.