Bathrooms are places where heat and moisture are in constant attendance, and one result is that tiles and floors are likely to become covered in mold. Mold is easy to remove, but can also spread to other areas of the bathroom, such as the bathroom caulking. Getting mold off caulking can be very difficult, as it can spread into all of the tiny air gaps and become entrenched in the grain of the caulk. There are a few options for getting rid of mold in bathroom caulking. One is very simple and easy to do, but the other is much harder work and more likely to result in damage to your bathroom tiles.
Getting Rid of the Mold
If the mold has only just begun to show on the caulking, you may be lucky enough to get rid of it using a few natural ingredients. Mold can be removed particularly well with wine vinegar, lemon juice, or even apple cider. Rub it into the mold and leave for a few minutes before wiping down. Then spray it with water. If this has not done the trick you can try a more extreme, but still cheap, version of this by mixing white wine vinegar with baking soda. Shake vigorously for a few minutes and whisk into a paste-like substance. Scrub your caulk with the cleaner and leave for a few minutes. Add a little bit of bleach to some water and spray this on the caulk. Leave this mixture to dry before scrubbing off.
Getting Rid of the Caulk
If the mold is stubborn or comes back after you have removed it using the soda paste, you may have to consider removing the caulk itself. This is a radical step that can leave your bathroom tiling vulnerable, and you would have to avoid showers and baths while new caulking dries. However, if the mold repeatedly comes back, you will certainly have to completely remove all of the affected caulking. Often, mold will flourish in the very corner of a caulked section, and you will have to strip away both sides to get at the caulk.
Chip the caulk away as gently as you can with a chisel, removing the last pieces with the edge of a screwdriver that has a flat-edge bit. Brush all of the caulk off the walls and bathtub, as you don't want to leave infected caulk laying around while you apply a new layer. Once the caulk has been removed, spray a mixture of bleach and water directly on the area. This should ensure that any residual mold behind the caulking is killed. Allow the bleach to dry thoroughly before you add a new layer of caulk. You may consider mixing the caulking paste with a little bleach, and you should definitely spray more bleach and water mix onto the fresh layer of caulk before it dries completely, in order to ensure that the mold is completely gone. You will have to monitor the new caulk while it is settling in, to make sure that it doesn't become infected with mold or mildew.