I have a flowmaster that I replaced about 3 months ago, but now the tank is not filling or filling very slowly. Do I really need to replace it again already?

I have a flowmaster that I replaced about 3 months ago, but now the tank is not filling or filling very slowly. Do I really need to replace it again already?
Sometimes a little dirt stops the flow. Read instructions as to clearing trash.

\Hi Dan and Welcome to The Plumbing Page at AMHD.com. You're responding to a 5 year old dead threads so I gave you one of your own. Please check the date before you post. Thanks
I can only repeat what I've always said.
You have a Fluidmaster ball cock, you don't have to replace the entire ballcock. Simply purchase a Fluidmaster replacement seal # 242, (see image), shut the water off to the tank and twist the top off counterclockwise. Replace the seal,(see instructions) and you're back in business. Good luck, Tom