There are several ways to kill mold spores, including:

1. Hydrogen peroxide: Pour 3% concentration hydrogen peroxide into a spray bottle and spray the moldy surface completely to saturate the area with hydrogen peroxide. Leave the surface to sit for 10 minutes, then scrub off the mold and wipe the surface clean.

2. Bleach: Bleach kills virtually every species of indoor mold that it comes into contact with, including mold spores, which leaves a sanitized surface making it resistant to future mold growth. However, bleach is only effective if the mold is growing on non-porous materials such as tiles, bathrubs, glass, and countertops. Mix one cup of bleach with one gallon of water and apply the solution to the moldy area. Leave the solution on the surface for 10 minutes, then scrub off the mold and wipe the surface clean.

3. Tea tree oil: Tea tree oil is an antifungal that is capable of killing all types of mold. Add tea tree oil and water to a spray bottle at a ratio of 1 teaspoon of water for each cup of water. Spray the solution onto the moldy surface and leave it to sit for a few hours before wiping the surface clean.

4. Vinegar: Vinegar is a mild acid that kills 82% of mold species. Cleaning vinegar, which contains 6% acetic acid, is the best type for killing mold. White vinegar containing 5% acidity will also work just fine. Apply vinegar to the moldy surface using a spray bottle, let it sit for 1 hour, scrub off the mold, wipe clean, and let the surface dry.

5. Ammonia: Mix a 50/50 solution of ammonia and water and apply it to the moldy surface. Leave the solution on the surface for a few hours, then rinse the surface clean.

Its important to note that while these methods can be effective in killing mold, they are only efficient when you recognize the first signs of mold growth and manage to prevent its development. In addition to eliminating the mold you see, you must also eliminate the source of the moisture that allowed its appearance in the first place.