Today’s Solutions: December 18, 2025

We recently shared three signs there may be mold in your house, but did you know there’s an even quicker way to do a mold assessment of your home? This is a 30-second trick that can clue you into a potential mold problem.

Check the toilet tank

Lift up the cover of your toilet tank and look for signs of mold on the underside. Toilet tanks have minimal airflow, so a rogue mold spore that gets inside can easily colonize. This means that mold that may be invisible on your walls or ceiling will likely reveal itself inside your toilet tank.

What to do if you find mold

If you notice mold growing under the lid of your toilet tank, first start by cleaning it, then move on to addressing the larger issue. You can do an ERMI test of your home as a starting point, but if you believe you have invisible mold lurking in your home, you will probably need to invest in a full mold inspection. Also, remember that just because your toilet tank is clean doesn’t automatically mean your home is free of mold. Conduct other tests, like those mentioned in the article above, to be thorough.

Solutions News Source Print this article
More of Today's Solutions

New method uses sound waves to map soil health, stop famine, and restore farm...

BY THE OPTIMIST DAILY EDITORIAL TEAM Across the world, soil scientists are trading in their shovels for something unexpected: seismic sensors. In a breakthrough ...

Read More

This simple 15-minute mindset exercise can ease anxiety, science shows

BY THE OPTIMIST DAILY EDITORIAL TEAM A growing body of research is revealing how a short, simple activity that is done in just 15 ...

Read More

3 habits of the happiest people

Think of the happiest people you know. Do you find yourself often wondering what they are doing to maintain a general level of joy? ...

Read More

Changemakers of the week: GRuB and SparkNJ

Every day on the Optimist Daily, we report on solutions from around the world. Though we love solutions big and small, the ones that ...

Read More