The dishwasher in our house was not working well. I decided to clean the drain. Dumb me. I couldn't get in to the drain because there's a tube going from a circle/filter thing below the arm/above the drain. I pop the top circle thing's tube off of it's rubber connector below, and this allows the arm to come off. Now, as I try to put it back together, I cant get the arm snapped back on - so with water pressure the arm flies off. I can't find a repair manual anywhere....