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Antonyms that are in the dictionary are marked in green. Antonyms that are not in the dictionary are marked in red.
A third agreed: "Sprinkle washing powder over it and use a yard brush and a little bit of water - that should work.”
Source: https://www.thesun.co.uk/fabulous/23595618/cleaning-patio-slabs-black-stains/
Councillor Dan Hutchison, Scottish Greens, said: “When you walk into this it feels like a dessert bar that has put washing powder and toilet roll in there.”
Many shared their own hacks for cleaning grimy over trays including using Tricleanium concentrated cleaner or washing powder in hot water for those who don't have a dishwasher.