SN instructed patient / caregiver to always flush your PEG tube before and after each use. This helps prevent blockage from formula or medicine. Use at least 2 tablespoons (30 ml) of water to flush the tube. Follow directions for flushing your PEG tube. If the PEG tube becomes clogged, try to unclog it as soon as you can. Flush your PEG tube with a 60 ml syringe filled with warm water. Never use a wire to unclog the tube. A wire can poke a hole in the tube. Your healthcare provider may have you use a special medicine or a plastic brush to help unclog your tube.