##Update: I have tried running the water without the head fill valve attached to clear out any dirt. I can see sediment in there, but it can't get through the inset washer. I tried popping it out with a screwdriver, but it's about an inch deep into the fill pipe, so I don't want to crack it.

Update:

I have tried running the water without the head fill valve attached to clear out any dirt. I can see sediment in there, but it can't get through the inset washer. I tried popping it out with a screwdriver, but it's about an inch deep into the fill pipe, so I don't want to crack it.

This question may be a duplicate of Toilet Supply Line and Valve Leaking, but I have some different symptoms/troubleshooting steps, and the answer supplied for that question doesn't quite fit (though it may be a lack of knowledge on my part).

This question may be a duplicate of Toilet Supply Line and Valve Leaking, but I have some different symptoms/troubleshooting steps, and the answer supplied for that question doesn't quite fit (though it may be a lack of knowledge on my part).

Thanks.