Start with the physical means, you don't want to be fishing around in caustic liquid. Usually you need to determine whether it needs to be pulled or pushed fairly gently as you don't want to make a blockage worse. Generally chemical attack is a last resort and unnecessary.
Start with the physical means, you don't want to be fishing around in caustic liquid. Usually you need to determine whether it needs to be pulled or pushed fairly gently as you don't want to make a blockage worse. Generally chemical attack is a last resort and unnecessary.