Start With Warm Water And A Firm Brush
The first step is surprisingly simple: use plain warm water and a firm little brush. It may sound too basic to matter, but this first pass is important because it helps remove the loose layer sitting on the surface. Wet the tiles and grout well, then scrub along the grout lines in small circles. At this stage, you are not trying to solve everything at once. The goal is to lift loose dirt, old soap residue, and that thin surface film that stops deeper cleaning from reaching the grout properly.
Use a brush that is firm enough to work into the grout, but not so rough that it scratches the tile or damages weak grout lines. A small toothbrush can work well in corners or on a tiny section, while a narrow grout brush is often better for shower floors or larger tiled areas. Work in smaller sections so the area stays wet while you clean. After that, wipe everything with a clean damp sponge or cloth. This helps you see what has actually been removed and what is still trapped deeper in the grout. If the lines already look brighter, that may be enough. If not, the surface is now ready for a stronger second step.
