Beachbound

I am going to guess here. My thought is that when the fabric is in the factory and is being wound on the bolts mice running overhead on pipes/beams/etc could drop into the machinery. As for twigs/grass/bird droppings, like a poster told us Bali batiks are dried outside, the wind blows stuff around and when they are folding mega yards of fabric...'stuff happeneds'. AGAIN this certainly happens rarely but it happens enough that I was glad to be aware of something I had never considered. Things like this does not bother me as long as I know to properly prepare my fabric. It's just like I wouldn't eat veggies fresh out of the garden dirt without washing them. I wash new dishes before I use them, new clothes before I wear them...