I boiled bottles, nipples and pacis once when everything was new out of the package and after that just ran through the dishwasher. Occasionally I would use those steam bags for breast pump parts that had been sitting all day, and I'd toss the paci in for good measure since I was doing it anyways. I did the first boil because the manufacturing process is dirty. Ever notice dusty stuff that is new out of the package? I have, and who knows what that dust is.
Dreft is pointless in my opinion. It isn't dye and perfume free. And it is pricey. All free and clear is better because its is free of perfumes and dyes, and cheaper besides. I think there is a Tide version and Purex too. And they only need used at first. If there is no issue with allergies, most moms stop by 6 mos or a year.
People will think me weird for this, but I washed (and still do for my two year old) stuffed animals and stuff like that. I didn't, until one day at the toy store I saw this mom who had given her kid a stuffed animal to entertain it while she shopped. He obviously had a cold and rubbed his nasty nose and eyes all over it, then she put it back on the shelf. It was really really gross, and I don't know how mom didn't notice when she picked it up. After that I wash them. I am sure it is completely unnecessary, but I felt better.
My "how much is enough" is kind of based on whether the germs are ours, or something else I dont even know the origins of. Sick kids, bodily fluids of strangers, manufacturing debris, public restroom germs, and food bacteria are all things I avoid. We have pets and I know my son has managed to get a dog toy into his mouth more than once. I don't worry about that kind of thing so much, all those germs are already in our home anyway.