1. Wear rubber gloves before opening and during use.
2. Ensure there is no standing water in the sink.
3. Pour one bottle cap of this product down the plughole.
4. Pour a cupful of warm water(around 200ml) down the plughole.
5. Allow to stand for 30 minutes for the foam to penetrate through the blockage.
6. Flush with water for a few minutes to remove any remaining chemicals through the pipes.
7.To help prevent blockages from returning, use monthly.