Burger King review: watered down soda

I work near this location and like Burger King's Whoppers so when I don't have my own lunch I often go there to get there Whopper meal. On most days I get Dr. Pepper sometimes Root Beer, but every time I do it always taste a little watered down, like they turn there mix down. The first couple of times I got watered down pop I thought maybe it was out so I told there staff and they would check and say nope it's still full. Then I figured oh-well and would little watered down I will be alright, so as annoyed as I was I just let it go. That has been more than a year now. Today there Dr. Pepper, there Root Beer, and there Sprite was so watered down i couldn't take it. I asked them what the deal was and they said it was fine, in fact one of the employees tried there Pop and said taste good to me. Obviously they do not plan on changing the mix levels so I walk out and have no plans on going back. I'm tired of there sub-standard products even if it is just the Soda.