As some have no doubt discovered, multiple cleanings can help. It was true with my VPI 16.5 and is still true with my Degritter.
With some LPs the noise is baked in during pressing. I have an Anne Bisson that has been cleaned multiple times on the VPI and also on the Degritter and is still somewhat noisy. I should have returned it, but was busy and thought I could clean it and make it quiet.
Y'all be cool,
Robert