Two of New York’s filthiest eateries have taken a speedy path to squeaky clean, garnering a grade-‘‘A” redemption under the city’s restaurant-grading system, a Post analysis has found.

Dino’s Pizzeria, in Riverdale, The Bronx, was closed down for six days after its colossally bad health inspection of April 12, in which it racked up 162 violation points — the worst inspection in the entire city since 2009.

Among the 18 offenses an inspector found that day were mouse and fly contamination, hot foods not kept hot enough, workers in dirty clothing and employees handling food without utensils.

But a mere three months later, Dino’s scored just 10 violation points on a follow-up inspection, good enough for a coveted “A” rating.

“We did what we had to do,” a manager said.

Among the other establishments bouncing back from disastrous inspections was the Ting Wei restaurant, in Flushing, Queens, which flunked with a colossal 155 violation points in July 2010 but went on to win an “A” rating in December 2010.