West Ham stopper Danny Gabbidon admits the clubs strikers cannot afford to be wasteful during the run-in.
The Hammers slipped to the foot of the Premier League table over the weekend after defeat to Chelsea on Saturday.
West Ham have not won for five league matches and within that run they have failed to score three times.
Their failure to convert chances was highlighted at Stamford Bridge as they missed a host of opportunities to equalise before Chelsea sealed victory in the last ten minutes.
And Gabbidon admits things need to improve in the last third, saying: "It seems the same old story that we never take our chances.
"We play well and create and never get the result. So it is disappointing. We put in a lot of hard work and we had chances to score and when they had their chances, they took them.
"For long parts of the game we did well and 3-0 is really disappointing.
"I can't really take any pride as a defender from my performance as we lost 3-0 so I am disappointed."