various questions

Question

1-I saw that regarding spices you said that onecan use all of one's regular 100% spices without buying new ones for pesach. I had understood from previous years that you were very makpid on needing to buy new spices because, for instance, what if you sprinkled garlic powder into your steaming pot of noodle soup? 2- is bagged lettuce that I buy all year, i.e., dole, fresh express, allowed on pesach without having the special Passover sticker on it? 3- if the housekeeper takes the laundry on her own to wash can she on Passover? If not can the kids laundry be done? 4- if a non Jew is cleaning dishes or using the sink with hot water can she leave it on for me so I can then continue using the water? If yes can I close it? Thank you . chag kasher v'sameach