I was cleaning my X100F yesterday, and I sprayed the qtip with the lens cleaning solution and wiped the viewfinder glass, but somehow it got inside?! I don't know how, I didn't sprayed directly onto the viewfinder, I cleaned it basically as I always clean my lens glass. There are few more, but you cannot see them from this angle. It's not much but it's annoying, because I didn't have these stains until yesterday and I have this camera for 5 years.
Anyway, is there a fairly simple way to clean it from inside without completely disassembling the camera?