Ecozone’s Allergy UK approved Drain Cleaning Sticks are an innovative and effective drain maintenance solution. They use powerful natural bacteria and enzymes to break down organic build-ups such as; food, oil or soap scum, that get stuck in drains causing blockages and bad smells. Actively working to prevent obstructions from occurring, these clever sticks help to protect drains all year round, with one pack providing 12 months supply. Fragrance Free formula.