So maybe I've been a little too spot-happy in Battlefield 4 (on PS4). The spot button is R1, and after just about 5 hours of play the button starting sticking on me a bit. Some quick googling found that this has been common for others.
I took the controller apart, dropped some tiny bit of oil on the posts that R1 was getting stuck on, seemed to do the trick. Disassembly/assembly was mostly easy except the springs on the R2/L2 triggers took some fiddling.
Not too happy that after <10 hours of play the controller has these issues. But at least it was easy to fix.
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