Remember to wind off the torque before you put it away.
Since I couldn’t see anywherein the instructions of the Norbar one I have about this , and I had been told years ago that it was a good idea , when I bought mine I phoned Norbar up to ask if they would expect this to be done. I was passed to one of their technical staff who said basically it’s not necessary ‘but probably wouldn’t hurt’. He said it would probably be best to leave a little pressure on the spring.
I have a 300/350 and the instructions definitely say to wind off but NOT BEYOND THE LOWEST SETTING!!!!111!!ONE!
I now leave it and my Teng parked at the lowest setting which is probably enough pressure to keep things right. I don’t remember being taught that in torque wrench school but it sounds plausible enough to be true, probably from winding off the stops and REALLY buggering the calibration.