Mold can be a nuisance, and it’s important to know how to deal with it effectively. Bleach is often recommended as a solution, but it’s important to understand its limitations and potential drawbacks. While bleach can be effective in killing small amounts of mold on hard surfaces like glass, porcelain, tile, and non-porous countertops, it’s not a one-size-fits-all solution. When it comes to porous materials like cardboard, wood, and concrete walls, bleach can only kill some of the mold on the surface. The root of the mold is embedded deeper than surface level, and bleach requires direct exposure to be effective. This means that using bleach on porous materials can only change the color and look of the material, rather than eradicating the mold problem. Furthermore, using bleach on porous materials can lead to unintended consequences. The bleach is mostly water with chlorine, which means that once the chlorine evaporates off the porous material, the water will soak into the material. The water left behind will provide food for the mold that wasn’t killed off, making the situation worse than before. To effectively deal with mold, it’s important to identify the root of the problem and take appropriate action.