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Yes, it is permissible to open these on Yom Kippur, though not at perforated openings, and preferably avoiding tearing where there are letters. For further discussion, see Deracheha's piece on Menstruation on Shabbat, here.
On Yom Kippur, it is permissible to clean off dirt from the hands, using no more water than is necessary. If necessary for health reasons, liquid soap may be used as well.
Gemar chatimah tovah!