Reusable Dryer Balls Save Energy
Dry, dry again!
Use wool or rubber dryer balls in the clothes dryer to reduce drying time and static. Wool dryer balls can also absorb extra moisture. These are an efficient alternative to dryer sheets, which can create buildup on the dryer’s filter and reduce air circulation. If you prefer dryer sheets, scrub the filter once a month to remove buildup
Source: energy.gov