Before the night of the fourteenth of Nissan, it is necessary to tidy all the rooms and houses in the courtyard. A woman should also thoroughly inspect all her clothes and their pockets; for perhaps she put chametz in them, and even if there is a doubt one needs to check and verify. At the beginning of the night of the fourteenth we search for chametz with the light of the candle immediately after the stars become visible. One should do netilat yadayim before saying the blessing on the search, as mentioned by the later rabbis of blessed memory.