I wash, starch, and iron all yardage when it comes in the door before I add it to my stash. The starch helps keep the dirt and oils from dirtying the fabric and makes piecing easier. You also don't know what shoppers in the store have handled before they picked up your bolt of fabric. I wash all quilts before I use/gift them.
I wrap all of my fabric on 12" x 6" cardboard and place in a plastic tub. I also put 2 or 3 cotton balls with Lavender oil in each tub. Thru the years, I've never had a problem with bugs, and the material stays fresh and clean. Dust around here is horrible.