id say 7 days it not long enough to clear up an ear infection, my annie died from an ear infection that the vets had thought was cleared up after one month of drops then another month of drops
it spread to her brain and filled her lungs.
please make sure it is cleared up b4 you stop treatment, and really you shouldnt be bathing her with an ear infection as the water can go in to the ears with the dirt and germs.
hope your little one is better soon