Or, just use a hose with a pressure-wash attachment or strong sprayer
nozzle after adding hot, soapy water to the cooler and the flipped open
lid. You might want to tether it down because when the water hits it
the Ingloo Lunchmate cooler *will* go flying. Do wear shorts, too,
unless you don't mind getting wet.
(Thanks, leo, this is fun!)
The great thing about those old Igloo lunchbox size coolers is, they're
sturdy. They're also fairly inexpensive. My real advice is, if you let
one get so grungy you can't figure out how to clean it without a sonic
boom... you might just hop on over to a store and buy a new one. That's
my 2 cents added to leo's. We're up to 4 cents now. Any other takers? ;)
Jill