IPhone Lifeproof Case Speaker Letting in water?

I have a lifeproof case and when I was testing it I saw bubbles coming up and I found out that the speakers for the case were letting water in. What did I do wrong?

They're junk.
My sister went through THREE. In a month! They're junk.

Number 1? Dropped down stairs and shattered. It's not suppose to do that!

Number 2? Fell on grass, it cracked!

And number 3? My pitbull stepped on it. She's not even big! She's a mix but mostly pit, but she's short and doesn't weigh much.

They're junk. Don't waste your many or worry. You didn't do anything wrong. They just suck