The syringe does two important things that your shower doesn't: it directs the stream of water into your ear to the right depth so that it actually pushes the w

The syringe does two important things that your shower doesn't: it directs the stream of water into your ear to the right depth so that it actually pushes the wax out instead of further in, and it has a bend in it so you can't insert it deep enough to damage your eardrum.