Thanks for the baking soda trick. That one is new to me, although we use baking soda for a lot of other things.

We also use wipes. Generic cheapies. Lightly antiseptic and not very tough, but they get the job done. Two can give you a pretty good cleaning without using any water (much lighter to carry) and does a lot to reduce the discomfort of desert living.

Cheap too. So we (being retired and "thrifty") use them a lot when in the field.