Life Hack: What are dryer balls and how can I use them in my laundry?

You may have noticed dryer balls for sale in shops and supermarkets becoming more readily available in recent years. There are two styles usually available, plastic and wool, both offering different benefits.
I love a super-easy hack that takes almost no effort to do, but delivers really impressive results.
Anything this easy feels like it shouldn’t work but some of them are well worth trying. One great example is adding dryer balls to your tumble dryer.