Curious that if instead of the 1 exit hole. One does something similar, only with say 1/2 doz holes around the tube. Something that has multiple exit ports to reach all areas at once, like a dishwasher does.
Or even 4 holes, 1 drilled through both sides and one more 1/4 - 1/2" on top, again drilled through so there's an offset cross like pattern. BUT keep the end hole smaller, or closed so the pressure exits the sides .
Those pics give me an idea or 2 to work with, if you don't mind? Something else to put on the list.