I'm going through this with DD's clothes - her BFF sprayed HER THINGS with perfume while they were hanging out over the weekend and I think the kid is back on my fecal roster.
I had to double-wash with unscented detergent using an extra water, deep wash cycle and adding about 1/8th-cup baking soda to the drum. I also double-rinse.
You could also try soaking in unscented OxyClean before re-washing with unscented detergent?
For the sebum, I might try switching to a powder formula rather than using liquid or gel-pacs. I like Rockin' Green, but it can be pricey.
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Liz
DD (3/2010)
"Make mistakes! Get messy!" - Miss Frizzle