Although you’re not supposed to take your iPhone into the shower or for a swim, many users do so anyway, causing water to get into the speaker. Fortunately, there are several free, simple ways to get water out of your iPhone’s speakers.
Use the Water Eject Shortcut on Your iPhone
First, make sure you have the Shortcuts app on your iPhone. Shortcuts is a native Apple app, so if you haven’t got it, simply download it for free from the App Store.
Download: Shortcuts (Free)
Next, get the handy iPhone shortcut called Water Eject. On the webpage, tap Add Shortcut to download it to the Shortcuts app.