When I have wax buildup about once a year, I flush with warm water and a "Monoject 412". I shoot the stream directly into the canal, almost as hard as possible, over and over until it is completely clean. I have been to a physician where a nurse usually does a similar procedure with a machine. They however, leave my ear hurting and have even noticed bleeding after the procedure.

I do not recommend trusting a doctor with this procedure. DIY is safer in my experience. You do not need to stick the monoject in your ear, just get it close and direct the stream into the canal.