The higher the score, the better the washing-up liquid performed in our tests. Certain parts of the test are more important than others, and so carry different weightings. We think a washing-up liquid’s most important job is to bust fat from plates, so a large proportion of our total test score is based on this. For more ways to keep your household running smoothly, sign up for our Home newsletter – it's free monthly We first tested washing-up liquids in 1959. Our rigorous assessments separate the best washing-up liquids from those you should leave on the shelf. Top 10 Chocolates Top 15 Chewing Gums Kinder’s Product Range Nutella’s Product Range Ferrero’s Product Range Kit Kat Range Cadbury Range

A washing-up liquid needs to earn 79% in our rigorous tests to become a Best Buy. Those with less than 45% become a Don't Buy.