216570 Polar Explorer II Losing Minutes a Day

[wfxt]

At first I thought it was perhaps that I had not wound it enough or worn it enough, but it always lost a few minutes every month -- and one day it was close to 30 minutes off, so I figured the power reserve was down.

I wear this watch most days, and today (after wearing it all night and to bed) I just looked and it was about 15 minutes slow.

I never abuse the watch, although it is pretty much my daily at this point -- I bought it from a known seller on this forum a few years ago and it was fine, if a bit slow.

Now I don't know if I am going crazy or not, but this seems like a serious problem. I could take it in for warranty repair, as it was bought in Italy in 2017 but don't want to be without my daily for months on end...

Will try wearing it consistently for the next couple of days and see -- the only thing I can think of is that it was on my nightstand a couple of weeks ago and had the window open, and strong gusts knocked the lamp off (and the watch with it, onto the wooden floor below, but could not have been more than 3 feet.

I would think that this would not damage the movement, but perhaps?