Chux Magic Eraser Easy Cleaning system removes soap scum and mildew fast and cleans with water alone. Now cleaning can be as easy as wet, squeeze, erase! CHUX Magic Erasers activate with water alone and penetrate surface grooves to easily lift and remove soap scum and mildew. With the power in the Magic Eraser (not your elbow) and no toxic fumes to breathe in, these cleaning blocks are ideal for removing built-up grime, soap scum and mildew from sinks, bathtubs, shower screens, and even tiles.