I have a Waterman Expert ballpoint that is about four months old which I keep on my desk at home for writing mainly short notes, groceries, reminders etc.. It's a heavy pen which is why I don't carry it around like I originally intended to when I bought it.
Anyway, ever since I got this pen I noticed there was a bit of play or looseness in the twist mechanism from when it is closed to when I can feel resistance before it starts to twist open and vice versa. Recently I have noticed that the looseness has increased a bit, to the point where I am writing and I can feel it when i write with the pen which is quite annoying. I can also feel it when i pick up the pen. I've tried unscrewing the pen and putting it back together which sometimes helps but after a few days of using, it becomes noticeably looser again.
I don't have a lot of experience with pens so i don't know if this is normal for the brand or for this type of pen although i doubt it since it is quite noticeable and annoying. Any input or info on this would be appreciated.