It's time to clean your washing machine! Even if it's not visibly dirty and grungy, this will help clean soap scum and mineral deposits in the pipes and hoses. You just need vinegar, bleach, and two wash cycles!
Brighten dingy floors. Combine half a cup of hydrogen peroxide with one gallon of hot water then go to town on your flooring. Because its so mild its safe for any floor type and theres no need to rinse.