Tampa police said Mays' wife found him unresponsive Sunday morning. A fire rescue crew pronounced him dead at 7:45 a.m.
He said he was hit on the head when an airplane he was on made a rough landing Saturday, and his wife, Deborah Mays, told investigators he didn't feel well before he went to bed about 10 p.m. that night.
The coroner's office expects to have an autopsy done by this afternoon.
U.S. Airways confirmed that Mays was among the passengers on a flight that made a rough landing on Saturday afternoon at Tampa International Airport, leaving debris on the runway after apparently blowing its front tires.
Tampa Bay's Fox television affiliate interviewed Mays afterward.
"All of a sudden as we hit you know it was just the hardest hit, all the things from the ceiling started dropping," MyFox Tampa Bay quoted him as saying. "It hit me on the head, but I got a hard head."
Tampa police spokeswoman Laura McElroy said linking Mays' death to the landing would "purely be speculation."
Born William Mays in McKees Rocks, Pa., on July 20, 1958, Mays developed his style demonstrating knives, mops and other "As Seen on TV" gadgets on Atlantic City's boardwalk. For years he worked as a hired gun on the state fair and home show circuits, attracting crowds with his booming voice and genial manner.
After meeting Orange Glo International founder Max Appel at a home show in Pittsburgh in the mid-1990s, Mays was recruited to demonstrate the environmentally friendly line of cleaning products on the St. Petersburg-based Home Shopping Network.
Commercials and informercials followed, anchored by the high-energy Mays showing how it's done while tossing out kitschy phrases like, "Long live your laundry!"
His ubiquitousness and thumbs-up, in-your-face pitches won Mays plenty of fans for his commercials on a wide variety of products. People lined up at his personal appearances for autographed color glossies, and strangers stopped him in airports to chat about the products.
Mays liked to tell the story of giving bottles of OxiClean to the 300 guests at his wedding, and doing his ad spiel ("powered by the air we breathe!") on the dance floor at the reception. Visitors to his house typically got bottles of cleaner and housekeeping tips.
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