Fruit and leaves stain all paving surfaces — clear them off the resin before they have a chance to leach.
For soiled areas, mix 1.5 L of liquid sodium hypochlorite (from swimming pool maintenance suppliers) with 4.5 L of water and 100 ml of non-oxidising shampoo (e.g. baby shampoo). Apply via pump spray across the whole area, not just spots.
Pre-wet the area with clean water, spray the cleaning fluid, and gently scrub with a stiff bristle brush. After 15 minutes, rinse with clean water — make sure runoff doesn’t reach vegetation.