The only reason I am suspicious is because I had no top notes appear in my final extraction. That is my only basis for questioning the sock. I readily admit, that is a very weak basis. It was more likely that I filtered the extract down to 2 micron and the top notes I was seeking were larger than 2 micron.
Curious, can you describe the "residue" you have accumulating on your 2 micron filters? I had quite a bit on mine, not to mention it took many hours to filter and I had replace them a few times (suggesting it clogged quickly).
First I use a 6" funnel I purchased and a two quart pitcher. A standard coffee filter fits nicely in the top section of the funnel.

For Cold Maceration with PG, I allowed about 45 minutes to an hour for gravity filtering.
For PGA/VG Heat Extracts, I very gently squeeze the coffee filter to expedite the process before the PGA evaporated.
After each extract, I disassemble the funnel (two parts), rinse well with hot water, and wipe clean and dry with paper towels.
For Cold Maceration in PG, the extract goes directly into an Aeropress set up with a standard AeroPress filter, when I gently and slowly push the extract through the filter into a Kerr's Wide Mouth jar I 'acquired' from Mamaw's kitchen.

Then I disassemble the Aeropress, rinse each piece well and dry with paper towels. Then I set up the Aeropress with a 2 micron lab filter, and slowly and carefully ease the extract through, making sure I am pushing it through the filter and not around it.
Everything gets rinsed and wiped clean every step of the way. I might lose 20ml or so, but the remaining Extracts are clean.
For PGA/ VG extracts, once they are filtered first in the funnel/ pitcher, they go back to the mason jars and placed into the chest freezer for a week (while I am working). The following weekend, I remove each jar, one at a time, to filter in the Aeropress. First with the standard AeroPress filter, then with the 2 micron lab filter.
I haven't tried freeze filtering the Cold Macerated PG Extracts yet, but I know from the PGA/VG Extracts that
@Str8vision method does seem to clog up coffee filters as you go along.