Window Washer Fluid keeps disappearing 2013 s60 volvo

[humorgoesalongway]

I have a 2013 s60 volvo and after each ride I take the washer fluid goes down a little bit even though I haven't used it at all. The top is kind of flimsy, but is secure after I check it after each ride. None of my other cars have ever done this. I was wondering if this has happened to any other volvo s60 owners.