Top green tech that saves you money

Before you say anything, yes, we Crave hacks do wash our clothes -- every month -- but even we could save some money with Ecozone Ecoballs. You whack them in your washing machine and clothes come out sparkly clean, at lower temperatures than conventional washing powders and liquids. But how? Ionic cleaning power, that's how! The Ecoballs cost £35 and will last for about 1,000 washes.