The term 'shower problem' is a common issue that many people face in their bathrooms. The crossword solution for this term is 'MILDEW, ' which is a type of fungus that grows in damp, humid environments. MILDEW can cause discoloration and damage to surfaces, and it can also produce a musty odor. It is important to take steps to prevent MILDEW growth in the bathroom, such as using a dehumidifier and regularly cleaning and drying surfaces.