First, shake off as much dirt as you can. Don’t worry about paper, as it’s just going straight into your trash bin, anyway. You need to check each piece for plastic, though.
NEXT, jUST RINSE, OR WASH PLASTIC BAGS, IF NECESSARY. YOU NEED TO CUT OPEN THE BAGS, SO IT MIGHT BE EASIER TO LAYER THEM IN A BUCKET OF HOT, SOAPY WATER AND LET THEM SOAK, IF NEEDED.