They don’t bath
The Himba people Namibia are one of the tribes on the continent that have secluded themselves from the pressures of civilization. They have maintained a host of cultural practices which includes not taking a water bath.
Like everyone who takes a bath, now and then, the Himba do not bath because of harsh climates in the region and due to the value placed on water.
Instead of water, they use smoke with a combination of red ochre on their skin. According to Momoafrica, they put some smoldering charcoal into a little bowl of herbs (mostly leaves and little branches of Commiphora trees) and wait for the smoke to ascend.
Thereafter, they will bow over the smoking bowl and due to the heat, they will start perspiring. For a full-body wash, they cover themselves with a blanket so that the smoke gets trapped underneath the fabric.