If you have loosened the pivot and that still didnt work or you had to loosen it so much it has play, just disassemble, clean everything, check the washers and make sure they are flay and smooth, I have one PM2 and a Shaman that both needed to be taken apart, cleaned and just rubbed the washers on my strop with 1 micron diamond paste a few times, cleaned with alcohol then reassembled, put a few drops of oil on it as well, now can tighten the pivot a lot more and drop shuts like a champ, no blade play. That was just 2 out of about 30 plus spyderco I have, the rest just adjusting the pivot and a bit of oil did the trick