Mold

Be careful whatever you do. Mold spores can cause respiratory issues, even if you kill them.
One of the things that causes mold is moisture, and adding more water won't solve the problem. Bleach doesn't activate unless you add water, and at the highest concentration of 4 parts water to 1 part bleach. Normal household concentration is 10:1.
You would be better off to find a product that is made for mold remediation. Also remember that you can't mix different products like bleach, and ammonia. If you do, you'll get the dreaded "chlorine cloud of death". Do a google search for mold remediation to get a better idea how to procede. Tim