When trying to clear a clogged bathtub drain, place a heavy cloth in the bottom of the bathtub so your shoe soles won't scratch the bath's enameled surface.
Stains or moisture at the base of the toilet bowl indicate that the joint or seal between the toilet and its outlet has failed and should be reset immediately.
To clear a clogged bathtub drain, hold your hand or a rag over the waste and overflow plate, cup the plunger over the drain and plunge it vigorously several times.
Modern bathtubs and showers can be made from a myriad of materials ranging from the conventional enameled cast iron and steel, to fiberglass, acrylic, and man-made materials such as cultured marble.