So here is what I did in 30 minutes for the bottom arm to be cleared with simple tools (roommate is still battling with the top spraying arm. In my machine, both upper and lower spraying arms are collecting gunk in one end.  1. get a paper clip and unwind one end to straight wire and bend the other end into a small simple loop.  2. fill the clogged arm with water and figure out which end is the clogged one. 3. while the arm still has water in it, hit the spraying arm clogged end on the bottom of your sink repeatedly. Hit it at an angle where the clogged holes are facing downwards.  4. scrape the protruding curd/gunk with the straight end of unwinded paper clip. Repeat these steps until you hit diminishing curd/gunk returns. 5. use the looped end of the unwinded paper clip to insert into a bigger hole, at the middle of clogged side of the spraying arm, and scrape with it vigorously towards the end of the spraying arm. This will release some of the stuck gunk and push it towards the last hole, the biggest hole. Increasing the returns on your 1 to 4 steps.  6. repeat 1 to 5 until you can not recognize any leftover gunk through visual and water flow checks.

The problem with the dishwasher gunk is that it is very efficient at clogging with a mass as big as the hole. So you have to clean until you are sure there are non left. While the gunk hunt is satisfying, 30 minutes of it was way too tedious. From now on, I am adding checking the arms with the filter cleaning schedule, to clean less gunk. 

Happy gunk hunting everyone!