A wall-mountable apparatus enables a user to scrub the user's back hands-free. The apparatus includes two primary features, namely, a slider plate and a back-engaging assembly. The slider plate includes laterally opposed plate-to-assembly engaging structures. The back-engaging assembly includes a plate-engaging interface structure, a bezel structure and a liquid material delivery assembly. The plate-engaging interface structure includes laterally-opposed plate-engaging structures. The laterally-opposed plate-engaging structures cooperate with the plate-to-assembly engaging structures for attaching the back-engaging assembly to the slider plate. The bezel structure includes a hemi-ovoidal outer surface, and an assembly-receiving inner surface. The liquid delivery apparatus is received adjacent the assembly-receiving surface and includes a liquid receptacle and liquid delivery elements. The delivery elements are in communication with the bezel structure for outletting liquid from the liquid receptacle to the outer surface. The back-engaging assembly is vertically adjustable relative to the wall-mountable slider plate.