Ken89911T

Anyone have experience with cleaning out debris left over from degraded foam blocks? Waiting to hear from OEM, but curious if anyone else has tackled this problem. I keep getting debris clogging my fuel filters; seems the previous owner replaced the foam blocks but did not adequately remove the particulate debris. I'm planning on replacing the blocks, but there must be a lot of crud down there at the bottom where the lift pumps live. Any ideas welcome.
2009 997.1 car with Premier cell/bladder