I have a new 2009 Prius with 650 miles on it. I fill up the bladder at 1/2 tank. This is my third fill up. I am on 73 miles and the first pip is not gone. On the other two fill ups it was a lot sooner for the first pip to disapear. Does this sound normal? From reading other posts I know the bladder does have some issues. Thanks Love it so far!