Re: New bamboo fibers have oil... what about hemp?
I don't know about separately prepping. I do know that hemp requires a lot of prep to be fully absorbent. I was told as many as 10 washes.
Me, I'm lazy, I would toss the hemp and bamboo in together to prep and not worry. Since I have all natural fibers(mostly cotton) when I bought 3 hemp fitteds I just tossed them into the diaper pail with my dirty diapers. I did this twice and then put them into use. To increase absorbtion I made sure to use them as soon as they were clean so they could then be rewashed. I used frequently for the first month(like 10-12 times) then they went into regular rotation. They are primarily used by my husband and daughter.