I am a prewasher. Anything I bring into my home gets prewashed before I use it. I went to a big box store a last summer and after watching a customer come into the store heavily perspiring, she then made a bee line to some fabric in the corner where some very soft cotton was stored. She tried indiscreetly to conceal what she was doing but one of the clerks caught her wiping her brow and face and arm pits. She was ushered out of the store and told to never come back. When that happens the clerks/manager has to take the bolt and cut off at least 2 yards of fabric to make sure it doesn't get purchased because of body fluids being transferred to any one else. That woman was perspiring so heavily you could see the soil on the fabric. They cannot sell this. If it falls on the floor that's one thing but body fluids are another. I personally can only stand the smell of the new fabric until I get it home. I wash everything and especially if anything is purchased at thrift stores or estate sales. I use lingerie bags for smaller pieces than yardage.