Hi All, how exactly do you do this?

My lower left extraction site has been oozing brown fluid for days and I finally got in today to get some antibiotics, and was told to irrigate the site after every meal. The Dr flushed it twice and a LOT of fluid came out and it felt great. I tried to do it myself recently and dont know if I'm doing it properly as it stung but nothing came out. Do you go at it from the side of the site or do you plug the syringe straight in from the top? thats where mine is leaking from.

Doc didn't say anything about my other extractions (had all 4 removed). Should I be irrigating the other lower site as well? There's no leakage at that site at all but I'm still generally tender in both sites equally.

Thanks!