It depends on the particular item. For things you can't wash you can dry it on hot and seal it in a plastic bag for two weeks. We always did two weeks, and had lice every year in the spring when the kids were little. Stuffed animals and pillows can be washed in hot and dried in hot. Furs, leather and suede need to be taken in and cleaned by a professional and sealed in plastic bags for two months.
For your bed, just turn your mattress and wash your sheets and all blankets and the pillows themselves in hot and dry them and dry them on hot to kill everything.
Let me give you a little tip about the hair though. I got so tired of using the shampoos over and over and worried about absorption through the scalp. With four kids who have thick hair and the girls had really long hair, the way lice was passed back and forth around the school, we would end up treating everybody in the house at once and doing all the beds, pillows, etc all on the same weekend, 2 or 3 times every spring. The school nurse told me of a much better way to go about it. Very safe, kills them very well, and really conditions the hair too.
Cover dry hair in mayonaise. Regular mayo from the grocery store. Just saturate it. Comb it through very well and saturate it some more. Get some of those clear plastic shower caps and put two of them on. Then wrap your head up good in a scarf and tie it. Leave it on for 12 hours. It takes that long to smother the lice. Then come out the hair with a nit comb with the mayo in it, then wash it several times in regular shampoo to get the mayo out and recomb it with the nit comb. It really works. It's also easier on the hair than the lice shampoos.
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I'm giving it another shot. We will see.
My forum is still there and everyone is welcome to come join as well. There is a private women only subforum there if anyone is interested. Also, there is no CAPTCHA.
The link to the forum is
http://www.rightplanet.proboards.com