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And the sidewalk fronting the 1916 civic building was deep cleaned this week, washing dirt and gunky residue from the concrete.

Signs at this storm water pond warn not to drink the gunky water and not to swim.

Scientists don’t yet know exactly how Alzheimer’s forms but one theory is that gunky amyloid buildup plays a key role, although drug after drug that targets it has failed.

“The cords get gunky, they don’t retract. You have to hold the thing down with your other hand.”

Then, scrub for mere moments with a sponge — any crusty, gunky residue will melt right off.