1, soda vinegar dredging method: first pour half a cup of cooked baking soda powder into the sewer, then half a cup of vinegar. After soda reacts with the acid in vinegar, the sticky substances in the pipeline can be removed.

2. Adopt hydraulic dredging method: take a plastic pipe (or rubber pipe) with a diameter of 10 mm and a length of about 1 m, one end of which is tightly sleeved on the faucet, and the other end is inserted into the blockage of the pool. Wrap a cloth around the rubber hose, plug the drain of the pool, turn on the faucet and screw it to the maximum, and the water pressure is enough to wash away the blockage.

3. A pneumatic cylinder similar to an oxygen cylinder (but much smaller) is connected to a 40 cm metal nozzle. Fill the blocked pipeline with water until it is about 10cm away from the nozzle, put the metal nozzle into the pipeline, and wrap the pipeline mouth with a wet towel to seal it. Turn on the air pressure switch and hear a clear sound of water, and the project is over.