On the morning before Passover, chametz may be eaten until the fourth hour of the day. After that, only foods that are kosher for Passover are eaten. We don’t eat matzah, though. We’re saving that for the Seder.
Since even a minute amount of chametz is prohibited, we carefully rinse, brush, and floss our teeth, to ensure that we really have gotten rid of all the chametz within us.
Now we’ve got an hour to put away all the chametz utensils, and any other chametz that will be sold over Passover, in their designated areas, and gather the rest of the chametz together for the burning of the chametz.
The Burning of Chametz
On the morning before Passover, before the fifth hour, we burn all the chametz that was found during the search, and anything that was left over from breakfast and not stored with the chametz that will be sold to the non-Jew. (This should have already been arranged with your Rabbi, or online.)
After the chametz has been burnt in the fire, we recite the following declaration:
All leaven or anything leavened which is in my possession, whether I have seen it or not, whether I have observed it or not, whether I have removed it or not, shall be considered nullified and ownerless as the dust of the earth.