Splash, water, and dust resistance are not permanent conditions and resistance might decrease as a result of normal wear. Damages caused by liquid are not covered under our warranty.
It is never recommended to immerge a cellphone, wherever it comes from. Your actual phone, while rated as water-resistant from the factory, is probably not resistant anymore today.
At Celeri.ca, we close back every phone using new original seals. We still won't advertise the phone as water-resistant.
Lear more about Splash, water and dust resistance here. (External link)