The Costa Rica international joined the Cottagers from FC Twente in the summer and has netted just once in nine appearances, although seven have been as a substitute, but he is confident he can become a consistent scorer at the Southwest London club.
"I was not frustrated by my start at Fulham but of course I would like it to have been better," he said.
"It is a process I have to follow with Fulham in the Premier League and I am feeling very good. I feel strong and hopefully I will get more minutes.
"I think I can help provide goals. All the players will do our best and do better in the team.
"I think we have good quality up front. We have many good players that can score and create chances.
"We have to improve that because I know we can do much better. Personally, I will try to do my best as I know my team-mates will do too."