“Making them prone to moss, algae, and dirt build-up, so a seasonal scrub keeps them looking fresh and safe underfoot. “A bucket of warm water with mild dish soap and a stiff-bristled outdoor brush works wonders for lifting everyday dirt, without damaging the surface. Once it’s cooled down, use warm, soapy water and a clean cloth to wipe away dirt and grime, advises Cooper. His simple end-of-season checklist… ‘clean, cover and store,’ keeping your BBQ safe from harsh weather. Munby goes on to say autumn winds often bring dirt, leaves, and debris that can scratch glass or damage frames and seals if left unchecked.