We first tested washing-up liquids in 1959, and more than 65 years later we're still at it – now scrutinising the cleaning ability of big brands such as Fairy and Ecover alongside supermarket-own ...

Aldi Magnum Washing Up Liquid (500ml) 69p, £1.38 per litre. 9. Aldi's Magnum washing up liquid is a cheaper alternative to Fairy Credit: OLIVER DIXON.

Fairy says: “Fairy Max Power antibacterial washing up liquid refill carton allows you to refill your 370ml upside-down bottle more than twice and helps you to save up to 85% of the plastic.