Fortunately I haven't had to remove the nano (knock, knock) but for cleaning out through holes I have had great luck with just a cheap solder sucker like this...
The key to using it to clear holes, and I will never admit how long it took me to realize this, is to hold the sucker on one side of the board with enough pressure to get it solidly touching the board and the iron on the other side.? I usually do two heats.? First to remove the lead or pin from the offending component then another for the solder sucker to do its work.? Fun fact: if you don't make sure the top is locked down in the slot the plunger will fly higher than you think it will.
--
