In my experience, the nut is very tight at all times so turning "until tight" doesn't necessarily work.  You don't want to over tighten this because it will shorten the period to a complete repacking of the gland.  I would try 1/6 turn first or maybe 2/6 if you have a lot of water.  I had a little bit of water in 2018 (less than 0.1 liters) and tightened it by 1/6.  At the end of 2019, I again had a little water (again less than 0.1 liters) and tightened it again by 1/6.  We'll see how it goes by the end of this season (crossing my fingers there will be a season ....).