"I don't know what the problem has been, but we have to sort it out and soon," said the keeper.
"It's true that we have not been playing as well as we can and the most important thing now is that we continue to work hard to put it right.
"When you play badly and do not reach your best but still manage to win games that does mean something, but one day the luck will not be with us and it is on days like those when you have to play better or you will not get the result.
"I suppose as long as we are winning it doesn't matter how we do it, even if that means winning ugly like we have been.
"But, like I said, one day the luck will not be with us and that is why we have to make sure our form is better so that we are still able to win when this happens."