Artificial grass will usually self-clean when it rains. During prolonged dry spells, however, it is worth occasionally hosing down the lawn area to flush out any dust or dirt. Easigrass yarns used to make the grass are designed not to stain, however, if a mark does appear on the grass then first try removing it with warm water. Gentle detergents (washing up liquid) and artificial grass cleaner can be used for spills such as milk, tomato sauce, alcohol, butter, ice cream, fruit juice mustard or blood. Use gentle diluted mineral spirts (vary sparingly) on oil-based spills such as suntan lotion, cooking oil, grease, nail polish, ink and shoe polish. Avoid using bleach on the grass.