How do i open the drain out bathroom bottle? If you require specific advice on any sainsbury's branded product, please contact our customer careline on for all other products, please contact the manufacturer. Great group here , fast and reliable ! Enter your cintas-provided mycintas id, account number or work email address. If it remains clogged after using the homemade drain cleaner, you might need to use a small plunger for sinks the baking soda.