Lottery officials said Souami waited a day before he checked the numbers at another location that happened to be a lottery retailer.
But on the way to the carwash, he stepped into a 7-Eleven convenience store to check the tickets.
"When I went inside, I scanned the first ticket and it wasn't the victor". The second ticket was "good", but on the scanner read instructions to see the cashier. "And she kept saying, "Oh, my God".
"I love orange juice now", he said, laughing. He has two children.
The winning numbers were 23, 28, 41, 53, 56 and the Powerball was 14.
The player in Idaho also played the Power Play option which increased their winnings to $2 million.More news: Danny Kirwan, guitarist of Fleetwood Mac, has died at 68
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After learning he was a victor, he spent the next three weeks planning the rest of his life.
He added it took him more than a month to come forward as he was working to make arrangements to quit his job as an accountant for a food importing company.
The first things he plans to do with winnings are pay to pay off his college loans, pay for his daughter to go to college next year and pay off his home, which he had just refinanced and received the check for last week. The married father of four chose to take the money in a lump sum, so he'll get slightly more than $183 million after taxes.
And perhaps he'll toast with his new favorite drink.