Here’s another great tip from BobVila.com.

It’s certainly not new on the scene, but in this age of tightly built homes, mold is the new public enemy #1 for homeowners. And here’s the big news: Bleach won’t get rid of it!

Molds have evolved over billions of years to thrive anywhere there’s water and food. They spread through microscopic airborne spores that are present in the air we breathe. Surprisingly, there’s really no such thing as a mold-free environment.

All mold spores need to take root are constant moisture and organic material to feed on. Your mold problem could begin with something as small as a leak in your bathroom tile, creating the ideal conditions on the wood framing and paper-faced drywall of your bathroom wall.

It’s estimated that 40 percent of American homes have a mold problem. We know mold can follow a flood, but it can also happen when interior air is over-humidified or there’s not enough ventilation. It can happen behind vinyl wallpaper or any other vapor barrier. And it can happen when a roof leaks or because of a leaky toilet or appliance.

While our grandmothers would have washed moldy areas with bleach, we now know that some mold species have evolved to resist bleach on porous surfaces. While it will remove staining temporarily, the mold’s roots, or mycilla, remain embedded in anything organic and regrow in as little as 24 hours. Flood victims who have relied on bleach report that in as little as three days their mold problem comes back with a vengeance.

Mold remediation has become big business. Faced with tens of thousands of dollars’ worth of work with toxic chemicals, which may or may not be more harmful than the mold itself, some homeowners have had no choice but to tear down and rebuild or move.

It’s important to catch mold problems early. If you suspect mold, check the EPA’s web site for instructions on removing it. Removing the affected material altogether is usually safest. But if it’s an area larger than 10 square feet or there are very young or older folks living in your house, don’t try to do it yourself.

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