Removing mold from LPs?

I was hoping you could share your experiences on what products (brand names or DIY) and/or processes have worked the best for you in removing mold from your LPs. I bought a SEALED LP that is 28 years old (that I already have a few copies of) and was all excited to hear a pristine version - just to open it and see it was embedded with what I believe is mold which didn't come off with a good cleaning with Disc Doctor fluid and my VPI 16.5 (and three rinses). It is definitely affecting the sound. Any ideas are appreciated!