When squeezing citrus juice, you probably try to get the most juice out so as to not waste money or the fruit. However, there’s a culinary reason you might want to squeeze only almost all the way: to avoid too much bitterness.
The trick is to put on just a little – just enough to make the flavor ‘pop’. If you can taste salt, you’ve put on way too much. Also, I find iodized salt just a bit bitter, so if you’re getting a bitter note try a sea salt, finely ground.