He'll take a coffee with milk, sugar….hold the chlorine cleanser.

A Colorado man has been posting warning signs in his Lakewood neighborhood after he says he drank tainted coffee from 7-Eleven.

Dave Dugan, an avid coffee drinker, said his coffee contained chlorine cleanser, CBS Denver reported.

"As soon as I started drinking the coffee, all my taste buds turned numb and my lips started to burn and I had heartburn all in my chest," he told the station. He said the store's manager told him that the cleaner was used in the coffee maker.

The station reported that a spokesman from the company said it is investigating the matter.

Dugan told the station that he has no plans to sue the company, but wants safer cleaning practices.

"How many more people that we don’t know about have been affected by this?" he asked the station.

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