You Gotta Have Balls

It's old technology that we've just adopted: Tennis balls reduce drying time.

They move around between the items in the dryer, allowing the warm air to circulate more freely and thus reach more surface area of the drying items. They also seem to reduce static electricity in the finished load.

There's an optimal number of tennis balls that will minimize drying time and maximize "fluffiness", however it's defined.

In my younger geekier days I would have worked the puzzle, but now that I'm older (and lazier) 2-3 balls seem good enough, so that's what we'll use.

In many, many areas of life having more balls is helpful.