I just now figured out how to get the residue off. I topped off the BB with warm oxyclean, and took a racking cane, a #64 rubber band, the kitchen sponge (was due for the trash anyhow), and some zip ties. Took the rubber band, wrapped it around the curved end of the cane really tight making a knob of sorts to keep the sponge from sliding off, peeled the scotch brite side off of the sponge, folded the sponge over the end around the rubber band, and zip tied it on, two zip ties for extra insurance, used the pliers to snug it tight. Wipe away...
Worked like a charm! The bend in the cane was just right to get in the upper corners and the slope up to the opening. Problem solved.
Drinking Fat Tire Clone
Carbing/Aging Westy 12(new world), Chocolate stout V2, Pumpkin Ale V2.5 (1st batch 2014)
In the bucket Pumpkin Ale V2.5 (2nd batch 2014), Kinda Double Bastard
On Deck The Kaiser, Blue Moon, oatmeal porter