The tutor I had when I was teenage advised me, that when tuning, the last movement should always be to sharpen the string. So if I get to sharp while tuning, I lower the pitch until the string is flat and start sharpening again.
As reported elsewhere
, I have issues of me treble strings (string 1 to 3) sharpening while playing. So far I attributed this to the string becoming warm. I have started to wonder, whether this is due to the way I tune. If there is higher tension between the roller and the nut after tuning, which gets released while playing, that could explain what I am experiencing. Friction of the sting inside the nut could be an explanation for an increased tension between roller and nut.