I noticed small piles of what I assume are bat droppings on the hardwood attic floor. The pellets are dry and dusty now. The attic is not insulated, but the whole floor should probably be cleaned, not just where the droppings are. Probably talking about 1000 sq, ft, roughly – its a big attic in an old Victorian house. What protective gear to wear, if necessary? What method – sweep, vacuum, mop or what? Any other tips?