You may just want to stick with the baby wipe shower, however a lot more people are bringing items like dry shampoo with them.
More and more you are able to shower in the Everest Region.  Bringing a small amount of shampoo and bar of soap can be very useful.  On days where there is no shower available, you can use the bar of soap with some water to make sure your hands and face are clean.  Keeping yourself clean and avoiding bacteria on your hands or face will become extremely important on the trail. You may just want to stick with the baby wipe shower, however a lot more people are bringing items like dry shampoo with them.